Here in Australia a lot of class associations stock standard products (mast sections, booms, beams, etc.) and sell them at cost price (or close to it).

This is a great way to keep ppl in the class as all the potentially hard to find products are at hand. Ofcourse this doesn't help if there isn't an association nearby, as I found out recently.

Classes that have association stock I can think of are the heron, 125 and mosquito, all of which are fairly successful or growing classes atm.