Welcome to the board !
If you can find one, both Traditions & Lyman flinchlocks came with a 24" bbl - about as short as you can get in a factory rifle.
The Traditions rifle is billed as an "Ultralight"
Love everything about the Lyman rifles. Good looking without being fufu, shoot straight, dependably. Maintainable whether you want to make your own parts of just call the dealer for a replacement. It's the best part of modern (specifications and tolerances) without the Buck Rogers look. Weight? It is a tad heavy but that's the trade off with a good rifle in a short configuration. I like a heavy gun so it's not a problem for me. Also I don't hunt so I'm not humping the gun through the bush all day. I'm going to participate in a woods walk this year (corona disaster permitting) but I'll carry my Pedersoli .45 Flinchlock. If and when I aquire a Lyman Great Plains in .54 percussion, I'll set it up for distance bench shooting.
Lyman:
Traditions: