I feel for you man ,my american bulldogs x2 have chewed though many pairs of boots and shoes,but nothing on my truck,they love truck rides. I have a canopy on the back with a bed for them to get comfy on. I would be --ssed too,if they chewed anything, it would probable be there last ride for a while,hell everytime i start the diesel i have to beat them off with a stick because they get so excited to come with me for a ride. When i'm out in the garage working on my truck the one dog i have just loves to sit in the truck for hours as i work on it,once i'm done thought i had better take her for a ride :-laf ,funny creatures. DW,PS---your best bet would probable be a bone yard for the belts.