i have to say you have a great eye for creating shapes ..the shapes look spot on ! , roof might need work but the shapes are there ! very cool ,
idea > to make the moldings around the windows you could use round wire and after they are on .. sand them in shape ..
i made the window moldings on my 1/25 revell charger from brass , bend them and glued them on with superglue .. then filed the shape in them
and as for wheels you can look for some 1/18 wheels online there are nice rims/tyres out there .. or get hold of a old 1/18 model and use the wheels?
your windows ..rear window is easy its pretty flat you could use clear material from anywhere , food containers .. bet would be to get hold of some thicker lexan ... but that front window is harder .. it curved ...i could be poible to make a mold from styrene or wood and then put on some clear material and by heating it (oven?) make it ink over the mold ...