If it's the little brass thingumajig you need then yes, Roaring forties would be able to help. They do the ends to fit to your own small horn etc. That's what I did. If it's powder, then Kranks for Swiss 0B. The Pedersoli pan primer they sell has a screw on end cap that can (never seen it happen) turn it into a stick of dynamite IF it ever ignites. When you shoot Flintlock in MLAGB or MLAIC Competitions you take the end cap out and replace it with a cork... just in case! I would post a photo of mine if I knew how?
I've even seen Competition shooters with individual phials for pan powder? Now that is OTT IMHO!