A nice looking LR_101 combustion chamber/injector recently sold on EBay. These seem to be getting scarce as the prices are rising fairly quickly. I've seen several of these fired at the RRS. The most memorable one just managed to clear the tower before rust in the internal passages clogged the injector and caused the fully loaded rocket to come crashing down to the ground at the base of the tower and directly in front of the (substantial) spectator bunker. Cool!