They're called drag link sockets. There's usually a bunch of them on Ebay for reasonable prices. Get one that fits the slot exactly, or grind a bigger one for a close fit.

Edit: I just found at least 50 of them in about 5 minutes.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!