AFAIK they are all the same
I rebarreled a Yugo using a surplus Chicom barrel last year. I used a Yugo RSB, gas block, and Chicom FSB. They all checked out good on the caliper and fit together without issue.
Threads are the same on the barrels but you may run into timing issues requiring that you either remove or add material from the lug shoulder or receiver face. The Chicom barrel was under-timed in the Yugo receiver in my case, requiring some material be removed from the receiver face, but YMMV.
Numrich's had pulled surplus Chicom barrels a few years back for $15/ea. I bought three and only one of them was usable, the other two had some pretty severe rings. The one that was in good shape was flawless inside despite having some minor exterior surface rust, and turned out to be a very accurate barrel.