I think all you need is the F103GT Front bumper and foam.

The F103GT is for touring cars and touring car type bodies.

it can be made to fit with a little custom work I think.

I would stay with the F103 sec, hand or a New F103RM.

And the F103GT was for the Advan Courage body and rubber or foan touring car wheels and tires.

And the F103 Porsche GT 1 was for the F103 with F1 Rubber or Foam tires.