Thought I'd add it to this thread rather than start a new one, but I have (1) .357 diameter hole for sale. Hole is approximately 8" long, and would need to be trimmed to length in order to work with this barrel blank.
Hole installation tool available for loan..... weighs approximately 3,000 lb and requires 440V 3-phase electrical supply for operation. Shipping both ways is up to the buyer.