Yes, but then the cost does skyrocket because the modification requires a custom stock. Stick with 3+1 and a conventional standard 98 stock will do. Lots of them available. Not so much for 4+1.
Even if I spent $5K building my rifle and had most of the work done that I did myself, I'd still be $10K ahead of a "bespoke" British rifle that's essentially the same action, shoots just as well, and cycles as reliably. $5K would be a lot more than some of the factory guns put forth on this thread and perhaps they cycle, shoot, etc just as well. Maybe better. But in the end that gun would just be something from the assembly line. Which is fine. Or the OP can have a gun built that truly identifies with him. Right now I'm making a cherry wood box for my rifle with a brass name plate recording when I built the gun. It will go to my grandson someday. Hopegully, it will mean something. If not, he can sell it and undoubtedly for more than I've got in it. Yes, ordering a bespoke British rifle, waiting years for it, and spending $10K more would achieve the same objective. But $10K is $10K. I can think of a lot better ways to spend the money ... like another buffalo (which I also don't need
).