The P38 seats are much more comfortable than the original Classic seats. They don't look much different but are just marginally wider and deeper from front to back. The latter provides better support for your legs. Changing to these would be a better proposition than recovering the originals. The mounts are near identical - maybe just need a supplementary bracket - don't remember. If you use the electric adjustments, move the controls from the sides to the front to reduce the overall width, needed to close the doors
I'll look at the MOMO wheel to see if I can find the part number, but you might be better off contacting the local distributor to be sure you are getting the right boss.
Alan

