Ok so are you looking for brand suggestions or just in general where to start looking? I tend to buy my parts online as it's much cheaper from Australia. The two sites I use are wiggle.co.uk and chainreaction.

Brands like Easton and Raceface do a good range from basic to top level, the main thing is getting the right sized and shaped bits. Have a look on those sites you'll get a feel for the ranges of what's available.