Rear bum stop suggestions?

[Kudzupatch]

1993 Suburban lowered with Belltech flip kit and frame notch and also has the helper air bags. It has what appears to be a thin cut down bump stop in place, but they are doing no good! Every once in a while I will hut something just right and bottom out on the frame. It is a hard hit too so it obviously needs a better bump stop.

Thinking someone might be able to recommend one that works? I see there are lots on the market but nothing like learning from others experience.