Here's all the options I can think of........
- USACG (USA Custom Guitars) Jaguar/Mustang Neck
- Warmoth replacement Jaguar/Mustang neck
- Fender MIJ/CIJ Necks, for Mustang, Jaguar, and Jag-Stang
- Squier Vista Series Jagmaster necks
- Squier Musicmaster III necks (the one with the humbucker)
- Fernandez MG-65 Necks (Fernandez's early 80's Mustang copy)
And if you are willing to shell out the dough, the following will fit....
- Fender Jaguar (1962-1975), I dunno if you are hip to the details on these, 65' has binding added, 66' and later has blocks and binding, and at least the 60's run of necks were available in 4 widths, with A being the smallest at the nut, and D being the largest.
- Fender Musicmaster/Mustang/Duo-Sonic II (1964-1980, except Duo-II, which lasted till 1969), as well as the Bronnco (1967-1975). Basically the same as a 62' Jaguar neck save a few minor differences between years.
Downside is that vintage necks are expensive, a little harder to come by, and you tend to be looked down upon for using them by vintage puritans, but they do offer the candy store for options only topped by the Warmoth and USACG necks.