I think it is a way to use up bulk ordered parts. Seems like with the 51 P and the Stink basses, they ended up with a boatload of Telecaster bass control plates.
But what about a semisolid P with an F-hole? Or a Mustang shortscale with the Tele Bass Humbucker?
Here ya go Chris:http://cgi.ebay.com/Vtg-Fender-Mustang-bass-competition-blue-short-scale-/140534944946?pt=Guitar&hash=item20b88914b2#ht_500wt_1156
I really like this but not $800 bucks worth of like.