I bought mine direct from the Choate company about 4 years ago. Not sure about the web addy - shouldn't be hard to find. IIRC, I paid about $150.
Actually, mine is the Ultimate Sniper stock, but it doesn't look much different from the varmint model. It's a solid, great looking stock and shoots very comfortably. Well worth the money. The only downside for some people is the weight - it's about 3 times heavier than my original Savage synthetic. It's not an issue for me, since I just target shoot with it, but I wouldn't want to hump it too far hunting in the woods.
A while back, I came across an online review of this stock - I believe on one of the "sniper" sites. The reviewer bashed just about everything about it, but of course, he expected everyone to afford a thousand-something dollar McMillan. It's a great product for 99.9% of the shooting public.