If you had an unlimited budget check out these:

http://mcreeprecision.com/

I've also wondered if savage would sell this stock to you, might be worth giving them a call but I would bet the odds of it are pretty slim:

http://savagearms.com/10batsk.htm

I have a choate short action in the ultimate varmint series, I really do like it, but either this one or the sniper is going to make carrying the rifle anywhere fairly tough unless you have a shorter and or varmint contour barrel. With a 28" bull contour (1" at muzzle) you'll be sitting at 14 pounds with the Ultimate sniper and barrel, 12+ with the Ultimate Varmint and barrel. Add 4-5 pounds for action and scope and you can see it's heavy, pushing 20lbs with a bipod on the Ultimate Sniper. If you only want a 20" varmint barrel (.750" - .800) you'd probably be alright to carry a little ways.