Alibaba got rid of the 40 thieves, is just a contact page which directs to different Companies suscribed to them. You'd be sorprised at the price quality these guys are achieveing making "recreational" non professionable sibs/ribs.
PRCH have a nautic sea province called Kingdao, where most of the factories are located. The only issue would be who will stand for the warranty in the event of a failure even though are well tested before shipment.
Most are using French Orca 0.7 to 1.0 mm Hypalon fabrics. Buying such small rib wouldn't be an issue and even can personalize it to your particular taste, just a matter to contact the right Company...