As Herb did not offer them the past months I have contacted him via his private email.
His reply:

Hello Erich,
Here is the situation with the cupholder. We made the mold and ran
the initial quantity of parts. I sold the last of the parts about a
>> month ago and the only way to sell more is if I have another molder make them for me. My cost for a limited number of parts is a bit over $1200. That means I'm out of pocket until I sell about 40
cupholders. If we can do that I'll have the parts made.

The cupholder price has been $29.95USD for the past several years, and seems to be reasonably well accepted. Shipping/handling has been $8.50 for US and Canada. To Europe and your area (Asia)the shipping cost is higher, but not a huge differential.
As far as RHD is concerned, I think I should refrain from that option. Herb
-----------------
Additional info from my side: that cupholder does not fit on consoles which have the holder for ASC and/or EDC.
It fits, however, on center consoles for automatic transmissions and for manual gears/shifters.
Here are the pics how they look. Please post if any interest, then I will inform Herb and he has to decide to go ahead or not. I will link this post also on other boards. If he goes ahead, you can buy them on Ebay.
click 1
click 2
click 3

E32 750iL 11/88, E32 750iL Highline 03/90
7 series Tech tips URL:http://tinyurl.com/3486c

• who has interest in Herb's cupholders? (url) - shogun 2008-06-12 09:06:46 (1210 views)
  • Is it too late to get one here in Toronto (nt) - c00per11242001 2008-07-25 19:26:46 (5 views)
  • yes, we get them!!!! - shogun 2008-07-03 07:22:40 (20 views)
  • plus 2, Shuby and LeRachat www.e34.de (nt) - shogun 2008-07-01 17:05:57 (15 views)
    • plus 1, dersalbader www.e34.de (nt) - shogun 2008-07-01 22:57:24 (11 views)
  • plus 1, latvius, 90 735i, bimmerforums.com (nt) - shogun 2008-06-29 21:58:15 (14 views)
  • plus 2, harlekeen and Supra3000 - www.e34.de (nt) - shogun 2008-06-29 16:54:33 (11 views)
  • plus 1, sweet7, E32 740i, bimmerforums.com - shogun 2008-06-29 09:39:56 (12 views)
  • BigKriss 1 set for E34 (nt) - shogun 2008-06-29 05:04:41 (14 views)
    • plus 1, Ralph525, German E34 Forum, www.e34.de (nt) - shogun 2008-06-29 08:45:10 (11 views)
    • plus 1, BMW1DA (Kevin) E32 740iL (Bimmerforums) (nt) - shogun 2008-06-29 07:44:23 (11 views)
      • plus 1, Slider1100 , www.e34.de (nt) - shogun 2008-06-29 09:34:08 (11 views)
  • +1 - ESPEN from Noway (nt) - shogun 2008-06-15 07:15:10 (25 views)
  • Re: who has interest in Herb's cupholders? - mrkevin 2008-06-12 17:50:46 (47 views)
    • a minimum of 40 interested in is required - shogun 2008-06-12 18:23:42 (37 views)
  • Re: who has interest in Herb's cupholders? - nevector 2008-06-12 12:21:45 (41 views)
    • +1 for DVD-Rookie in Germany (firm order) (nt) - shogun 2008-06-13 02:42:34 (32 views)
      • + 3 for Junzman3, + 1 for Knurmi (Bimmerforums.com) (nt) - shogun 2008-06-13 03:15:29 (29 views)
        • +1, CarstenE, German 7-forum (nt) - shogun 2008-06-13 08:16:29 (36 views)
          • plus 2 for genphreak (Nick) in Australia (nt) - shogun 2008-06-15 00:35:54 (27 views)
            • Re: plus 2 for genphreak (Nick) in Australia - genphreak 2008-06-15 00:52:58 (24 views)
              • Nick, if you need the headliner material down in OZ - shogun 2008-06-15 01:05:53 (27 views)
                • +1 for 'eem2x ' from the E34 board (nt) - shogun 2008-06-16 01:07:44 (22 views)
                  • +1 for 'cj08334' 740iL E32 from bimmerforms.com (nt) - shogun 2008-06-16 01:18:50 (30 views)
                    • +1 for 'DDK's 525' from Bimmernut.com E34 Forum (nt) - shogun 2008-06-16 10:30:24 (23 views)