Bottom Metal for 500 Jeffery

Gathering parts for a 500 Jeffery build.
Have a formerly 30-06 receiver and bolt.
Swapping the bolt head for a 338 Lapua head from midway.
Also grabbed the retaining pin and small diameter firing pin.
Have a .510 blank, Pac Nor #6 profile.
Grabbed a reamer from PTG
Now I just need to figure out the stock and bottom metal.

Since it's a cartridge with a massively rebated rim, the magazine needs to be a single feed.
I also don't want a DBM.
Anyone got advice? Or pictures of a similar setup?
I assume I'll have to do one from scratch, just need ideas/advice.

I wouldn't build that caliber on a standard shank action. Not that it would dangerous, but that big of case within that size barrel will definitely cause an extraction issue. The same reason Savage used a large shank on the .338 Lapua. As far as a magazine.....you'll probably have to build one. I don't know of any magazines, Savage or otherwise that would even come close to being compatible.