I gotta agree - thats an awesome gesture from Spurr, but i cant help wincing when you are talking about completely respraying the PF - from what ive seen, it doesnt need it.

Heres an offer;

How well does the paint on the spare PF match that of the one you want to keep? Depending on what condition the pin was kept in - the finish on it will be a slightly different shade of yellowing ( due to linseed based finishes).

If the match is good - chip  a piece off the spare, send it to me and ill post you a small Humbrol type tin of the matched colour. That way you can do the touch ups necessary and retain what looks to me like a very nice PF anyway