That’s an interesting idea. Instead of treating the supplier as an enemy bring them on to your side with an offer of “if this part fails less than 1% of the time we’ll pay you $X more per part”

Right now the only incentive they have is to give you a part that just barely won’t break for the absolute cheapest amount.

As a side benefit this would weed out the bad suppliers and the good ones will seek you out.

The guy came with his own prices, and said only buy passives from these companies.