What Ernst said... Try Mossberg or Gunbroker but the barrels I've seen have been in the $100+ range. I paid that for an ENTIRE, 20ga, like-new GForce pump shotgun...
Yhea. I have the 26 inch field barrel I was hoping to just do barrel swaps with 1 gun. Might actually be easier to get another gun. Just figured I'd try 1st.
I've cut many barrels in my day. Professionally... I cut square on my horz. band saw, deburr and file as necessary. Then drill, tap and remount the bead when done. I bought the tap to do this--I forget the size but it is written down somewhere. If you could find a used barrel to shorten--without rib preferably--that would be a good play.
These pics were handy and are of two H&R single-shot, break-actions. One is 28", the other is 18.5". I ended up getting an ATI stock for the shorty because it looked ganky with the short barrel and wood stocks. That is my 500 with 18.5 and Hogue "Tamers". I also have a new 28" barrel with chokes, rib and porting as well as an assortment of stocks I can put on for the desired mission. The H&Rs are long gone from inventory. I HAD considered making a lupara (internet example shown) out of one but I didn't want to get a $200 tax stamp for a gun I paid $50 for. Actually $100 for the pair of H&Rs at a pawn shop...