Timing Chain Temp Master Link

[mach4]

I don't seem to be able to find a source for the temporary clip-type master link for rolling in a new chain on a 617. I've seen where some roll it in with just the one that comes with the chain and some that use duct tape to hold the link during the rolling in process. Both seem a bit Mickey Mouse, though I suppose they would work. Any suggestions on where to get a link, or an alternate way to join the old and new on a temp basis?