P-bass profile neck with overhanging 21st fret

[bloke_zero]

Hi all!

I'm building a p-bass/stingray cross with a p-bass body and 70's style stingray preamp and pickup.  To make the 'look' work (musicman stingray faceplate) I need to source a neck with an overhanging 21st fret (see pic).

I've been directed to:

http://www.usacustomguitars.com/necks/

And they sure look pretty but I was wondering if there are any options closer to home or even where to look?  Or am going custom?

Cheers!

Alex