WTB Benelli M2 Barrel Or Aftermarket Barrel 18.5 Inch

I know it's a long shot but I ended up with two Benelli M2 shotguns with 26 inch black barrels. I was thinking about turning one into a HD shotgun. Just checking to see if someone had a 18.5" black barrel for sale or trade. I might trade my 26" barrel or something else.

Thanks