The answer is yes and no.
no one has made a full frp model however there are 2 types in existence
Jenpy made a resin version of the s1600 but these are v expensive if you can find one.
others (me included) have made there own using a cararama puma model, some car body filler to widen the arches and a donor rally car model (mine was a 206 I think) for the wheels and seats