Actually Rainey Kirk did the artwork on the series shirts. There was a 55 with incorrect factory colors (almost all red with a white stripe), a blue 60 series stock, and a UZJ100 mislabeled as an FJ80. Tony Twiddy had them printed up prior to the ANC store taking over TLCA merchandise. I never had those files, but Tony or Rainey probably do. The files I have are of the original 1976 logo. I found it, scanned, and Matt Farr cleaned it up for me. For the 30th anniversary I had t-shirts made with the old logo (red/white/blue) on the front and Land Cruiser in every script to current on the back saying "Don't Leave Pavement without one". I made 100 of them. I sold a few. I donated some funds to TLCA for the ones I sold and donated the last of them to events for the raffles. In the end, I lost $120 and ended up with 2 shirts for me and one for my son. And I'd do it all again in a heartbeat.
So back to the original question, artwork does exist for a few of the models. You'd need to correct the 55 colors in my opinion to make them salable. You'd have to do an 80 series and then the FJs, various Minis, and 4Runners, etc... Pretty soon you'd be making LX450, LX470, GX470, 200s etc... I've lost count but I think there was something like 20 different models. 25, 35, 40, 45 (and then both pickups and wagons) 55, 60, 62, 80, 100, 200, 7Xs (all sorts of varieties from pickups to Troopies and different years), FJ Cruisers, 4Runners (I think there are 5 generations now), Hi Luxes, Minis, Tacos (3 generations on that now), T100s, Tundras, etc.... There is no way to be all inclusive. It just isn't feasible. I think sticking with the current logo only makes sense for identity purposes of the organization. And it was Toyotas first 4wd model (slightly revised from the original BJ). I'd still like to see TLCA bring back the original logo in a sticker.