If its for a Remington M700 action, Brownell's lists 4 different ones priced from about $75 up to about $135, depending on the manufacturer. The Badger Ordnance is probably the best of the bunch for $130-133, depending on the length of the action. You may also go to www.snipercountry.com
and check the emporium. Sometimes people post them for sale there. Good Luck!