i want to buy a fender strat in the near future. online it says that the standard strat only comes in six colors, sunburst, blue agave, arctic white, midnight wine,black, and sage breen metalic. does anyone know if a music store can change the color of a strat.

also, how much would it cost for them to switch out one of the single coils for a humbucker?

just get a fat strat, and it will have a stock humbucker.

American Strat
Epiphone Valve JR head - Volume Mod'ed
Custom 1x12 with Private Jack speaker
Boss BF-3 Flanger
Boss DS-2 Distortion
Boss MT-2 MetalZone

Gretsch Acoustic
if you still want to swop it out it won't be that expensive just whatever the bucker costs a pickguard and maybe an hour's work
I'm pretty sure a regular music store won't paint it a different colour for you. You would have to either paint it yourself or take it to a custom paint shop. Maybe find someone who knows what there doing.