I recently bought a nova GSI ex- rally car. It's only done 5100 miles with a full service history and at £2000 it was a steel. There is a full roll cage in it and kingdragon bucket seats and a whole list of other things. But the seats are't on movable subframes!! With rally cars they have to be bolted to the body to be legal to rally. Where can i get some moveable sub frames for them and are they hard to fit??