Check out
Gra-lites. I've been thinking of picking them up for the shop.
There's a few other "commercial" waders out there too. Stuff for marching through cranberry bogs in.
They aren't pretty, or light, or breathable. All business...
Higher end Simms are great waders too, much thicker and tougher then the less expensive breathable waders from almost all companies, but, $$.