I would look in a Dixie catalog to see if they still carry them. I have seen them listed as a door alarm or burglar alarm also…a very long time ago.
5 or not quite 10 gr of FFFG and a tightly rolled up pice of newspaper, about 1/2” long and shoved down the barrel works wonders. Use your imagination on what to use for bait, and how to rig the bait. That’s part of the fun.