Their price list is still showing barrels unavailable, unfortunately.
If the MK. II barrels are like the Mk. III, there's ample material to work with. You could find a junk barrel (cut down, with worn rifling/rusted beyond recovery) and use it to machine a stub adapter, a la Cooey-Carcano. This lets you use anybody's new barrel blank and chambering without having to cut a challenging thread. Or, get a restorable rifle and swap over your good barrel, then use the take-off barrel, either as chambered or rebored to something fun. No threads to cut. This would leave you with a custom sporter AND a restored mil-spec. Win-win.