I doubt that McGowen made the barrels for the Zoli bolt guns built on the 1900 style Husqvarna action.
McGowen has loose Zoli 1900/8000 style action for sale on their site for $425. If you want McGowen to barrel the action, that will cost $650. If you McGowen to install the barreled action in a finished maple stock, that will cost $875.
Before I bought a stock from McGowen, I'd look for a recommendation from SBHVA or, as a last resort, look at buying 1 from Hansen & Hansen in Southport, CT.
www.mcgowenbarrel.comwww.hansenguns.comJeff