I'm wondering if anybody out there has a source for factory plastic retainers as I'm having a tough time trying to locate. Installing Kooks 2" headers (2012 A6 V-wagon) and I have broken one black plastic retainer on the O2 sensor harness and I would like to try and find a replacement without having to buy a complete wiring harness LOL. See photo, I think it's self explanatory which retainer I'm in search of. Anybody with any leads? Local dealerships are not helpful or even try to care.