OK, I give up.  I struck out completely at Autozone.  Here's how it went-

Me to counter guy- I'm looking for a connector for this injector.

Counter guy- what's it for? (looks it up) We don't have a listing. Sorry.

Me- When I called, I was told you had some in stock, and we could see if one
of them fit.

Counter guy shouting to another guy in the store- Hey, don't we have about
50 different pigtails for injectors. Someone told this guy we'd look through
them all to find one that fit. (Both laugh hysterically)

Me- Thanks a lot (exit the store, resisting the natural temptation to beat
the guy to death with my injector)

The used connectors seem just fine all the sudden :-)

Rusty