Hy Kipparham, go on google and type in Raybestos brakes, when it opens up click on the heading that says catalog [not home], now you select medium duty truck, then year, then make, then series. Then you can either select the specific parts you're looking for, or select all and scroll through. Write down all the part numbers you are interested in. Now go over to the Rock Auto site, and do a part number search, enter the part number, then select Raybestos from the drop down manufacturers list and press search. That will tell you if they stock the part and how much it is, hope that helps.