That FIA car is in London England now. Good luck on your search for a 40. If originality is important, then I would look at the ERA and the SPF. They have very original looking chassis but I think the original interiors were much more "raw" than the SPF. The SPF has a damn nice interior, more like a production car. That can be really nice. Look at a lot of pictures and see what you like and don't like. I always break my replica's down into exterior, interior, and engine bay when it come to originality. The RCR is very accurate on the exterior and the interior but the chassis is different.
I am little bias
so take everything I say with a grain of salt.