I have been trying to locate brake return springs for my 48 2-ton rear brakes and have had no luck with the local parts house. J. Carter advertises them, however when you get the ME148's they are not the proper length. In fact his catalog states that they are 7" long as they should be, but the spring he sends out is 10" long. Any ideas where to find a correct spring? I need to get the truck going to be in a parade this weekend in Omaha, NE.