If you can't find a Boer-marked "Model 96", you can always substitute a Chileno 95. They were the same rifle, precisely, and a big shipment of Chilean rifles actually went to South Africa when the war got going. DWM then manufactured new rifles to replace the Chilean rifles which went South.... which is why my Chilean "95" was made in 1902!
They can be scary accurate. Just ask any BritishBoer War veteran or American Spanish-American War vet! The US took 1400 casualties at San Juan Hill from the 700 Spanish troops at the top. Spanish rifle? The 93 Mauser in 7x57, almost precisely identical to the Chilean 95.
A friend and myself spent a lot of years testing rifles of this era. He was particularly interested in the Boer War, so we tested quite a few of those. One MOA seems to be what you can get, that or a bit less, off the sandbags at 100; a 1909 Brazilianwhich we tested several times came in regularly at half an inch. They were VERY good.
Ammunition, of course, was handloads. Factory stuff just is not accurate enough for this kind of serious testing.
Good luck!