Of course I'm assuming you were not at the Ford stealer, but this is all I could find...

Roller Track Upper Control Arms
Maximize the handling potential of your '65-'73 Mustang with ORP's Roller Track Upper Control Arms. Featuring replaceable sealed roller bearings with custom fabricated 4140 chromoly shaft, ORP's Track Roller Upper Control Arms eliminate the need for zerk fittings and grease maintenance but most importantly prevent caster changes with suspension movement, a problem that plagues all factory shaft mounted control arms.

Designed for heavy duty use, ORP Track arms also feature additional reinforcement to eliminate flexing under hard cornering and braking. The upper ball joint angle has also been modified to allow the upper control arm to be mounted a full 1.50" inch lower on the shock tower for maximum negative camber gain and traction. These arms also work well with the well known 1" upper arm drop although maximum grip is achieved with the recommended 1.50" drop. ORP roller upper arms are state of the art for vintage racing and are vintage legal. Fully assembled and ready for installation with a new Moog heavy duty ball joint.

Found at http://www.opentrackerracingproducts.com/trackupper/