Need to get oil seal injector o-rings

[Ed_Strong]

2004 E-350 6.0L no start after hot issue, after checking the injector o-rings, the oil seals were chewed up and corroded!

I would like to find good replacements but the Ford Part 3C3Z-9229-AA / 1843682C91 does not include this particular o-ring in the kit! I'm having a hard time finding them.

There's a few injector seal kits on ebay that include this o-ring plus the brass ring/washer and "C" clip but does not mention maker or brand, so I don't want to invest in an inferior part that would deteriorate and brake down again.

This link shows the injector o-ring seal for the oil eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices - its the one in the bottom left portion of the image!

Could you post a link to a place that would sell this part... thanks in advance