So there is a 10" 41 mag barrel on eBay that I plan on buying at basically any price because it's the only 10" I don't own.  Doesn't appear to have a bolt

Chances of me finding a bolt???

I've been looking for one for many years.  I have never seen one come up for sale, ever.
I finally just gave up and resold my 41 Mag barrel.  I think there is a good chance there were more 41 barrels made then 41 bolts made.

I would suggest buying a 41 bolt FIRST.....then get the barrel.

Tony