My father found the following document on internet, which has some interesting vehicle listing starting at page 134, whith all the vehicles officially sold in the USA.
There is also a list of body types stating at page 208, which we could use if we decide to modify the current vehicle categories.
(note: I refer to the PDF page numbers, not the page numbers printed in the document)
I uploaded the file there: www.imcdb.org/temp/2001.FARSmanual.pdf

It is interesting indeed, we could use this to check if vehicles are named correctly.

I can't seem to find Citroën in the section from page 134 on, whilst other makes which are not active in the US anymore are still in there ???