Found this consigned at the local gunshop, and though someone here might be interested. The stock has been fitted for the retention band, Looks like a nice piece of kit. The guy is asking $160, which is pretty good for both. Contact me if interested, and I'll give you contact info. Not mine, nor do I have any interest in the item. Just giving a friendly heads up on a hard to find item.
https://www.milsurps.com/images/impo.../RynxPAg-1.jpg