Bottom metal options for factory dbm inlet - McMillan stock

I currently have a Savage .223 in a regular plastic stock with blind magazine. Today, I will be meeting a guy locally to by his McMillan A5 stock that came with his rifle when he bought it. He is switching to an AI chassis. The stock he is selling me is inletted for the factory Savage DBM, which is not included in the sale. That being said I will have to purchase one through either Savage or SSS but am wondering if there are any other options (cdi, ptg, etc) that would not require modifying the stock. Thanks

CDI will fit, but there will be a tiny bit of extra space, as the factory setup is a 1/16 or so wider. I used CDI on a manners stock that was inlet for factory and it worked fine. I believe that accurate mag uses the same inlet as the factory setup as well as PTG.