75 xl250 carb, 81 xl500s trany
 

Does anyone know where I can get help or parts with a couple old xl's? Most used parts dealers don't even list a 75 xl250 and I haven't found even one listing for the 81 xl500s.
I need a replacement carb for the 75 xl250
and trany parts for the xl500s. I would be happy to buy the whole motor if I can find one.