ORIGINAL: Spadkun
Head gasket for a DL50? The cylinder and the combustion chamber are cast as one unit, there is no head gasket. Maybe the part digtman is looking for is the base gasket between the cylinder and the crankcase. There is an exploded view of the engine on the dlaustralia.com parts page. Perhaps someone could put the picture up to help identify the parts needed. I always get an error when trying to post pics.
Spadkun is right, there is no head gasket just the base gasket. I don't understand why he would have trouble getting ahold of Bob. I have never tried calling the guy but have emailed him on several occasions and he usually gets back to me the same day or the second. He is a busy man and he may have a regular full time job as well but I don't know if he does or not.