IF you have mechanical skills you can get another barrel and change it yourself. It's not really difficult. There are gunsmiths that will do it but using a factory barrel will be the cheapest way to go IMHO even with a gunsmith doing the work.
There's a man going around taking names
And he decides who to free and who to blame
Everybody won't be treated all the same
There'll be a golden ladder reaching down
When the Man comes around