A friend is trying to get his 79 westy back on the road and is having really bad luck. The latest problem is a cracked piston. Would anyone have a 93mm dome top piston? (please don't ask me why/what the dome top, I was told was that it's a later model 914 piston type and my guess is high performance?). He's called all the locals in the DFW area and no luck. shirley