Warmoth Guitars can do some custom work. ESP does custom. come to think of it, a lot of companies offer custom work now. i would also check ebay. if you go with a floyd rose trem, i suggest putting in a tremsetter to help keep it stable. you don't have to, it's just that i have used a guitar with one and it rocks. really keeps it stable when doing bends and whammy work. another thing to consider is scale length. the longer the scale, the farther apart the frets are. this might be something that might hurt your playing. i like the 25" scale that alot of people are making now. gives you the best of 2 worlds (24 3/4 shortness with 25 1/2's deeper tone - sort of ). that's about all i can tell you at this point.