RS5 Injector seals

I’m looking around for reasonably priced injector seals to replace during carbon cleaning. FCP is sold out and ECS has them at $30 per injector, certainly more than I want to spend. Anyone got a trustworthy OEM replacement I can try?

You can maybe try www.rockauto.com as they’ll have them on occasion. And it comes as a kit, the lower combustion chamber seal as well as the shim and o-ring for up top. I always get the part number for the kit and then google the part number to find the lowest price.