Yes, I bought one a few years ago for my 03-A3 project.
The stock is made by Boyd's for the CMPicon and is stamped with the CMP "cartouche".
At the time, you could order the stock with either a '03 or 03-A3 hand guard. I currently don't see the 03-A3 option any longer, so you may have to call and see if they have any more hand guards. The stocks are the same for either version.

The only issue I had with the stock was the rear screw hole needed to be opened up slightly so the screw would not touch. Other than that, it was a nice fit.

You can see the stock and other pics of the project here.
Resurrection: Restoring an 03-A3 Drill Rifle to a Shooter