Now, I might be mistaken, but I think just about all guitars and basses use the same size allen wrench for truss rod adjustment. Why don't you just go to the hardware store and get one of those assorted sets? The set I got at Home Depot only cost something like eight or nine bucks.
EDIT: I'm just gonna say that I probably am mistaken on the issue of all truss rods using a universal size, but my second statement still stands, just get a set of allen wrenches at your local hardware store, it'll be good to get different sizes for bridge and saddle adjustments too, I gather that most guitar manufacturers sell their instruments with crappy allen wrenches anyway, might as well get a good set that will last longer.
Last edited by hotsauce n eggs : 01-24-2013 at 11:52 AM.