It may be so @Highlander356 but if you think P guys love IM's ....No.
Did Frank start this hobby? Well yes. Are they good replicas yes and the 1984ish onward were on a square tube frame making them more of a substantial frame and rigidity. Any car kept in reasonable shape will move up with the cost of living.
Hence the increase to produce a new one and the possibility to see your car increase in value with time. Will it move like Seinfelds car assuredly not but you still will have and can have fun with them.
The USA has many more manufacturers that came out of this hobby making very good cars. Some very different and very custom with all sorts of combinations of features.
I wish you luck but I don't know if people other than IM would want to create such a registry. They have the data. As for getting a response the IM company is busy doing it's Ecar venture so they are more prone to disregard non support issue questions.
Buy something for your car that needs an IM part exclusively and an answer may be forthcoming but I don't think you will get a response on this question... Just saying.