Intersurplus, a banner advertiser has 9.3x62 barrels, new in the white, for $170 Canadian. Made by Zastava for sporter versions of the rifle you have.
The 9.3x62 option would be best for the intermediate action IMHO, because that's what it was designed for.
I've used these barrels for builds and they were basically just take off the old barrel and check headspace on the new one before spinning it on.
I've never had to rechamber one. That doesn't mean it can't happen though.
Intersurplus also has or had dies, cases available.