window regulator cable keeper metal replacement

[myeaglescout]

Does anyone know of a repair that can be done to replace the plastic cable end keepers on the rear (or front) door window regulators with metal keepers? Both of mine crapped out at the same time, and it's because the ends of the cables are contained in a plastic carrier that simply breaks. I've found repair kits online, but all the clips look plastic (sometimes hard to tell from photos, and not mentioned in description). This isn't the first time they have failed on this truck, and I'd like not to revisit this anytime soon.