PB Mini Mustang Parts

Hello all. I've managed to find myself a basically sound Mini Mustang but it does need a couple of parts.

Needed:

Bumper mount
Bumper
Spur/pinion gear cover

Nice to have but not essential:

Two speed conversion
Shell

I'll consider parts in any condition as long as it's useable. I'll even consider parts cars/chassis with the parts fitted.

Let me know if you can help.

Thanks in advance.