Try the Wolf Gold factory loads from various sites. I believe Midway carries it, along with Graf. Shoot it up, and there's your brass. You can also form them from .284 brass. I tried a .284 and it sized well in my Lee 7.5X55 dies, but I've not reloaded or shot them yet.
I've been looking for them too, but these have been my only options.
Hope this helps.
MH