I hadnt given much thought to seats and was planing to just make a timber insert into the frame, however for the extra price I expect they would make the Simulator just that much better.
Here is what I have found http://www.cardomain.com/shoplist~b~APC~t~Sport+Seats

I will toy around with the design and see what i can come up with in acad and solidworks.

Joe
Go Joe, we are counting on you