Well the reason why we didnt tackle the 9 and 12 inch figures was because the video would be never ending - the sheer volume of product Playmates put out over 7 years is still to this day pretty extraordinary!
I found *a* Jim Garber, but he never responded to me. Thats the thing here - this was all decades ago - many of them may no longer be in the industry or may have retired (or even passed away!). Even people who were around have hazy memories because there was no real need to "document" all this stuff. Having said that, Garber did a bunch of interviews in magazines which were all pretty extensive and generous in answering fan queries.
I used Varner & Hensey interviews in print and podcast form to gain intel. Varner never responded to me (I guess he/they are still pretty active in the industry) but Scott Hensey and I exchanged some nice words. I highly recommend checking out his instagram - he's created a bunch of "customs" for himself and friends - loads and loads of Trek characters that *he* wanted to see that never got produced.