Midway (
www.midwayusa.com) has Winchester .30 Luger brass (currently in stock, product #1390108721) at $31.99 per 100.
Gardner's (
http://www.gardnerscache.com/cast_pistol_bullets.html) lists the 84 grn cast LRN bullet sized to .311 at $35 per 500.
Gerhard