GunLord, NG:Dev-Team's new(!) Dreamcast run-and-gun game, is now available for purchase through retailer Play-Asia. The standard edition costs $39.99, with a soundtrack-bearing Limited Edition available for $49.99. An extravagant "Dragon Box" is on the site for $120, but is not available for purchase yet.
If you're put off by newfangled Dreamcast technology and would prefer to play GunLord on Neo Geo, you can get that directly from NG:Dev-Team.