You have your choice of McMillan, H.S. Precision, Bell and Carlson and Manners. I believe stockade does there stocks for both action lengths. Cant be sure as there site doesn't say but I think I have seen them on the 4.04". Also if you want laminate you have numerous options from SSS and stockys
so you have a few options
Yes, I also found out that the stagger feed stocks can be modified to fit the centerfeed ones. All of these places you showed me have options I didn't know about, Thanks!