The custom compacts were only made with the SA (short action).
But an even shorter action was used for the WSSM line of cartridges. I would imagine that a very good smith could take one of those and do a bit of welding to the bolt face and make one hell of a nice .250 savage out of it, but why would you since the .25 WSSM is available.
The other thing you could do would be to have a smith cut down a mauser action to the size of the cartridge you want. Jim Carmichel of Outdoor Life fame hunted extensively with a .250 Savage that was made on a mauser action that was cut down by Ron Lampert.
Here is what the WSSM action looks like.
and here is what Carmichel's shortened Mauser looks like