CH4D makes reloading dies for
http://www.ch4d.com/

11.15x60r Mauser
11.15x64r
11.15x65r LK Express

You might want to give them a call 740-397-7214. I understand that they can make brass, though I do not know the pricing. I believe they have formed 11.15x60r Mauser from .348 Winchester.

I purchased a set of dies for 9.3x82R from them recently. They were easy to deal with.

ASSRA has a reference to this round:
http://www.assra.com/gleanings.htm
"The Elusive 11.15x65R" J.C. Munnell, 9-pp. of reloading for it in three European double rifles, in September, 2004 issue of The Accurate Rifle.

Be sure to do a chamber cast.
http://damascus-barrels.com/files/Damascus-Barrels_dot_com_Cerrosafe_ChamberCast.pdf

Pete

http://www.damascus-barrels.com/Movie.html