Yeah, I was looking all over for a couple days, and this place didn't pop up under most google searches. I actually found it by searching "RIRI waterproof" pictures, and a small picture popped up that looked like it might be from a seller! They've also got some WP/B material that looks interesting, but no listed weights and fairly spendy.
Glad to share the info, and pretty reasonable pricing. They also reported $0 for shipping, but that might just be the auto check-out and shipping will be added. Still unknown at this time.