I currently own two percussion cap rifles, one is a TC Hawken and the other is a CVA, not sure the model but is identical to the Thompson. Both take #11 percussion caps which I am currently unable to find in the current US market for ammunition. I was wanting to know if there's anything I can use as a substitute until they are on the market. I am aware of the tap o cap but am uncomfortable with mixing the chemicals for the primers. Any advice is appreciated.