Looking for a replacement barrel for a Thompson Encore in 338 WIn Mag

Nearly new condition crossbow for sale along with case and 12 bolts/arrows and field points plus a crossbow block target. Sighted in and ready to shoot out to 100 yards. Specs include : - Rated at 400-Feet per second - TriggerTech Precise Trigger Control - Fiberglass composite step through riser - Soft lok floating bristle arrow retainer - Cnc machined aluminum flight track This package including the case and arrows and field points plus broad heads is $1100 new but selling for 1/2 that at $550