When I wanted a Henry Big Boy brass receiver in .357 all I could find in Canada was 20" barrel versions. I ended up getting on IRunGuns and ordered a 16" barrel one through them. I paid about $40ish CAD more than my dad did for an identical "except" 20" he bought at Cabelas about 2-3 months before hand. He picked his gun up, obviously I had to ship mine, which pretty much negates the price discrepancy for me as I would've had to ship either way.
I know those guys get some bad press on this site, but I've had 2 major purchases through them, inc one where I had to return it due to a manufacturer's mistake, and wouldn't hesitate to recommend them or buy from them again.
Worth looking into anyway.