What is this bushing called - auto parts has no idea!

[76Blue_Beast]

Hey Guys,

Ok so once again I've come to a small question or description issue with the darn parts people and I'm not paying 150 to have this replaced. Here is a pic of the pass side that was replace a year ago because the truck was pulling to the side when braking. Rotors and brakes have been turned and replaced. When bushing on this side (blue) was replaced it got better. I was told if it didn't fix it the replace the other side and it won't pull anymore. The only thing is every parts store I've gone to and showed them they have no idea what its called. Any idea so I get the right part and have to change once?

Thanks,
Ken