Scott, howcum you don't just slap an SX neck on your Fender for the time being? They're cheap enough...
I've got two SXs at the moment - a Jag and a maple-necked P, plus one of their rosewood/block J-necks on my Frankenstein P-Bass Special (the one with the TB bridge pickup). So that's 2.5 SX units in my posession... Great stuff for banging around with. Wish I had grabbed one of those T-Birdy Brice deals awhile back.