the cartridge is still made in india but not exported
https://www.youtube.com/watch?v=q55ZxgzXu6E

https://en.wikipedia.org/wiki/8%C3%9750mmR_Mannlicher
can recommend ch4d for a die set, brass can be made by using PRVI 8x56R Mannlicher or any other 7,62x54R Mosin brass. imho, the PRVI 8x56R is the best basic brass.
original there is a .324 diameter bullet of 244 grains weight thats not available anymore, maybe by custom bullet maker.
use a 200 grains or heavier flat base bullets for reloading.

http://forums.nitroexpress.com/showflat.php?Cat=0&Number=174842&an=0&page=0#Post174842