ive looked all over the place, everyone is out of stock right now, but mullberryfarms should be getting some either this month or next sometime if i remember correctly
I just happened to search through craiglist in search for anyone who had some silkworms and I found someone got 200 silkworm 1/2 lb chow for 30 bucks. Try on craigslist around your area you might get lucky or you might be able to find other types of feeders.