OK, here are a couple high load rating tandem wings I'm thinking about (input welcome):

Bi-shuttle 41: http://flyppg.com/Paramotors/Wings (837 lb. load rating)

Gin 42 trike: http://gingliders.com/paragliders/safari/ (813 lb. load rating) don't know if this is available in the US?

Any other suggestions? I'm going to start a topic post on Paraglider wing vs. parachute wing and post the link here. As per my previous, I'm doing small posts on individual issues and posting the results here.