[VLM]

How about nylon mesh bags? Nylon is not UV proof but its more UV resistant than the ikea bags. Some sources would be SOME mesh laundry bags and SOME mesh bags used by homebrewers to hold hops and stuff. For those folks who don't like filtering anyway. Or those folks who really do like filtering but don't want hops clogging up the filter, I guess.

Some (most? all?) HDPE is UV stabilized and you can get HDPE garden mesh in large amounts very cheaply. With a lot of sewing work I bet they'd look tolerably good and last a long time.