I thought CVA just didn't sell parts for their side locks i believe they still sell parts for their inclines
5. How can I get Parts for my CVA inline muzzleloaders?
Answer: • Please call the CVA Customer Service Department Monday through Friday between the hours of 8:30am and 4:00pm Eastern Standard Time at 770-449-4687. You may also fax your request to 770-242-8546 or e-mail to firstname.lastname@example.org. Please be sure to include the model name, serial number, and call back information if contacting by fax or e-mail."
but I would defiantly try to clean it first. depending on the gun the barrel may be the most expensive part and you may just want to get a whole new gun. seems to me that you can get the cheaper in lines for around $100-$200 less if you catch them on sale or find a good used one. if its CVAs top of the line gun then a barrel replacement may be worth it. I just ordered a new barrel for my CVA sidelock from Deer creek products, if CVAs main line cant help you then try them