Check out the Deadliest Catch (north sea crabbers) togs. If I really want to insure that I'll stay dry in a downpour, that is what I wear. Try a marine supply store.
They mostly use heavy duty Helly Hanson. I did when on a fish strangler in Bristol Bay, and again on an East Side set net site in Cook Inlet. Pretty heavy for hunting. For other duties, I use the HH light weight stuff.
