If you reach out to Chase, he would know. This is the gunsmith we use for re-barreling amongst other things. Really knowledgable guy.
https://www.fishertandc.com/
Hey all! I know there's some folks out there looking for a replacement barrel option for their CROSS's. Schnee's is going to start stocking them and can do custom orders as well.
https://www.rokslide.com/forums/threads/sig-cross-carbon-barrel.226810/