Rotor Blades
Jez
Certainly Robinson produce all their own blades and I'm sure Bell and Eurocopter do the same.
MD / Hughes still make some blades for current machines but are somewhat slow for producing them for older 500 models hence a company in the states, HTC if memory serves me right make excellent main and tail rotor blades for these earlier models, all STC'd, better quality, cheaper and available!
Hope this helps.
JB