another source of 8mm brass...
...annealing, sizing, and cutting down .30-06 brass, there's a 1001 articles about it across several forums so I won't bother with the details. I load for my k98 too, but i couldn't convince myself to buy loaded ammo at a premium when I could not just load the ammo, but 'make' the brass myself. There's the issue of confusing your head stamps, but any responsible loader knows to keep their stuff in properly labels containers (and to keep those containers segregated). Just my 2 cents.