it can be built with an old icp,ebp,map sensor and a icp repair pigtail
here is the icp pigtail http://powerstrokearmy.com/forums/showthread.php?t=28072
i can make one out of an old ebp sensor if you would like
Give Dennis at Strictly Diesel a call. This is what he sells http://www.strictlydiesel.com/p-2657-high-pressure-oil-gauge-install-pigtail.aspx I have it on my truck and worked great for installing a HPOP(ICP) gauge.