Window regulator part build quality

Olds Alero ’03 has a broken left front window regulator. The window motor’s OK.

This would make it the third time this part failed; different shops did both repairs, and I’m wondering if poor quality replacement parts may not have played a role, i.e. an OEM using a plastic that oxidizes and becomes brittle.

Online vendors offer several brands of regulators, (Delco, Dorman, Cardone, ReplaceXL, etc.), at varying prices. I don’t know which, if any, is better, or which if any has better odds on being better.

Non subjective questions:

1. Without considering price, are there any objective parts build quality reputation brand rankings out there?
2. What exists in the way of:
   • publicly available analytical data on brand quality, (i.e. strength of materials, MTBFs, etc.), arrived at by reproducible testing with rigorous controls,
   • or statistical sales data on rate of returns by brand,
   • or customer polling of satisfaction by brand.