Gary,
Here's the unit.
Reel Craft Model 7600 OMP, good for pressure up to 3000psi. List $322.
http://www.gradeatools.com/ReelCraft...7600%20omp.htm
I paid $263 and had to order it from an auto parts store as Reel Craft won't sell direct.
http://www.reelcraft.com/
Rumor has it if you live West of the Mississippi, GaryD will pay half for you.
Mike