I've lost the device I used to use to secure the chain when the rear wheel was removed from those of my bikes that lack a peg on the seat stay but can't remember what the damned things are called or where I got the original from. The device in question is slipped over the chain from the inside then hooked over the dropout, holding the chain in tension when the rear wheel is removed. I used to use it when transporting the bike to stop the chain from slapping against the chainstay. Anyone help with a source?