I have one I got in a trade earlier, but don't need. It is made by Viking Machine Tool, Inc. Came on a Ribbed style M4 6 pos stock so it will fit. Nice thin with a curved butt end. Very high quality in my opinion.
Can send photo if you are interested.
$12.00 plus $4.00 shipping USPS Priority.
USPS MO or Paypal (no fee to you).