i had the same issue.only the 4x4 trucks have those valve's.i asume you are talking about the one in the back with the spring that hooks to the rear axle.about the only thing you can do is call junk yard to see if they have any 4x4 dodge d-50 or mitsu mighty max trucks.most of them will have no idea what part you are talking about so just see if they have a 4x4 truck then you can go there to pull it or show them.if you cant find one than post up here again.what area are you from?

87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...