Need info on injector pigtail clip

[wrxsr20]

What's up guys, I just need to know what those "U" shaped pin/clips are called that go around the pigtail that connects to the injector to keep it from sliding off, they are all missing on my 240.
Also if anyone knows where I can buy them online I would greatly appreciate it.

[kruked]

Picture for reference? I'm drawing a blank because I've never seen a U shaped clip that goes on the injector pigtail.

[wiring specialties]

We have the connectors in stock

http://www.wiringspecialties.com/diywiring.html