I did hear from them today. I'll make a banner ad and get advertising by this weekend. After that, the feeders can be bought by following the ad link.
I've learned a bit from watching the feeder in my coop. The rats, and there are a bunch of them, are leaving the feeder alone so far, haven't started chewing on it or anything. My guess is that they have stolen so much feed already that they aren't getting desparate yet. The latest feeder with the metal bottom, back, and front might need to have metal sides that could be slipped in and fastened with silicone caulk. I can always make them if they turn out to be needed and give them to purchasers. The feed is lasting much longer but after I've had a good test on the feeder, I'm going to start posioning the little buggers because as their stored feed runs out, chicken toes might start looking tasty.
Other lessons learned so far. it needs to be set on a wooden base because it will eventually sink into the litter and the pedal won't go down. I used an old 2 x 12 about 24" long. Or the feeder could be fastened to the wall a few inches above the ground. That would really stablize the thing as it becomes lighter as the feed is eaten.