Another tip from me would be to lighty dry brush the Stock to give it that wood grain effect. It will stop the wooden areas lookin plasticy and add more realism to your weapon. I added the black dry brush work to TD 2441's T21 and it worked a treat!
Seems the correct width is 1" wide and the fixtures on the handle seem to be set up for this kinds of width too on the one I worked on.. if I come across any on my travels I will share of course. I'm on the look out now also for the one I built.