I just picked up a 50 caliber shortened barrel for mine off ebay this week. Some go for pretty cheap, others are asking for the price of the whole gun just for one part. I only paid $59 shipping included for mine. conditions vary, but the bore in mine looks really good, and the smith that shortened it put a decent crown on it. Even if there is a little rust in the bore, it can be worked to shootable condition for only a little time and effort