Remember Mark Baker?  He used to write for Muzzleloader magazine.  Maybe he still does.  I remember his rifle was a smoothbore.  Built just like a longrifle, with rifle sights, same stock, trigger guard, etc., but it had a smooth bore.  .50 caliber I think.  
Does anyone know who might build such an item these days?  I've had so many custom longrifles, but they were all so dern hard to clean.  A fullstock rifled barrel just will not clean up without a lot of time invested each time you shoot it.  I've tried the flushing tubes, all the different cleaning agents, but I always spent more than an hour getting the bore to produce a clean patch.  
Some say you don't want it perfectly clean; that it should be "seasoned."  But I want mine totally 100% spanking clean when I put it away.  
So, I've been thinking about a smooth rifle, or even a NorthWest trade musket with just the front sight.  They can be had in 28 guage (.54 caliber), but the advertised accuracy is 3" at 50 yards.  Seeing as how I don't really have a desire to use shot, and seeing as how I like the lines of a longrifle, what might I do?  I keep going back to a smooth rifle, but the only one I can find is Jim Chambers kit, which ain't really a kit at all, but a box of parts.  I have trouble taking my gas cap off the truck, so I know I can't put a gun together.  
Many years ago, more than 25, I bought a Chambers "kit."  It was the early Lancaster style with a 44" swamped barrel, with some cast off in the stock.  Someone put it together for me for $500.  Lordy did that gun fit me.  I wore it out, but instead of having it refurbished, I sold it.  I was so sick of cleaning that long barrel.  
Any thoughts?