Arca Leveling Base Ball Head

Combine this with the BOG Deathgrip Ballhead Conversion Kit, and you'll have everything you need to make it the tripod it should have been.  

Don't get me wrong, the BOG DeathGrip is heavy, but if you're not packing it far, there isn't a better tripod for the money.  Even with the conversion.  

Will also work on other tripods using 3/8-16 threads.