I'm thinking more along the lines of a nice short handy little brush carbine, maybe based on an over/under .410 or 28-gauge shotgun action, with barrels of around 20 inches in length. There are certainly some interesting possibilities for a lever-action repeater too, and the action of the Marlin M444 is a likely possibility, and certainly strong enough.
But I'm not waiting. I'll build my own, or at least I'll give the over-and-under a good try. It may take a couple of months before chambering reamers are available, but I know just the folks to ask.
Hmmm, scope sights, or not. We shall see....
-archy-/-