Just so happen to be building a semi-Scout on a Swede carbine. Tried one of those B-Square replace-the-rear-sight scope mounts on a Navy Arms Lee Enfield Jungle Carbine clone in .308 and it was just awful. Even with a raised comb synthetic stock, only my chin touched the stock when looking through the scope. Ack!
Luckily, those flat-stepped Mauser barrels lend themselves easily to making your own mount. I used a piece of 1-inch conduit with the Weaver rail off a 10/22 mounted atop it slid over entire barrel. Rear of pipe was attached with JB Weld; front has 3 small set screws in Y-shaped pattern so you can properly center on barrel. Hardest part is removing the old sight. It's soldered on; you need to get some Brownell's Heat-Stop paste to keep the heat from creeping down the barrel to the receiver when melting the old solder before removal of sight.
As soon as my synthetic stock comes in, me and the Swede Scout will be chasing some antelope.