Hey, these chummers are available on ebay and amazon. They're just dog ball throwers repurposed for channel catfish chumming. I found a pet toy manufacturer in China who was willing to produce these in small batches for me. If you're interested take a look:
NOTE: Although there are a few left on Amazon, I'll be sending as a shipment in to Amazon this week, but you can order them via ebay, and I'll mail it out from here. Also you can shoot me a message, and we can set something up via Pay Pal.