after a dye UL back for my lovely new LV front piece. preferably a .692, n a .689 but i'll take a couple of different bores for the right price. oh yeah, gotta be black or silver. cash waitin, or swap for brand new jt two piece stainless. cheers.
Just so you dont go on a wild goose chase... there is no .689 Ultralight back, they come in .684, .688, .692, and .695 (though these a rare as rocking horse doo doo!) The proto backs are a .690 if you can get hold of one of those (same threads).