searching for a set of 1 peice cranksets and single and doupble sprocket for a tandem schwinn or huffy or somthing like that, single speed, and also the adjusting sprocket for the chain tension on the front chain? have an old tandem frame that am putting back together and need the cranksets? also searching for parts for a skiptooth tandem front crank hub. has the cam chain tensioner setup in it. need the bearing nut for the left side of the hub. the one i have is broken apart.