Shaw will make one up at a reasonable price cheaper than the gunsmith route, unless you already have a donor.

I am considering getting a new FN M-70 Featherweight in 22-250 and having it re-barrelled to .250 Sav. I think that would be a sweet rifle.

Nifty-250

"If you don't know where you're going, you may wind up somewhere else".
Yogi Berra