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.
The Karma bus always has an empty seat when it comes around.- High Brass
There's battle lines being drawn Nobody's right if everybody's wrong
I have never seen a 760/7600 that has been rebarreled, have heard of them being rebarreled to 22-250, but have never seen it personally. I do understand that is popular to rechamber 35 Rem to 358 Win.