Go to www.car-parts.com and search using your zip code.
Look for a part that ONLY fits the Trac such as a mirror or grill. I say that as there is no real place to list the hardware you are looking for.
You can look up a bed and they will often list covers in there. Once you find a few, call them for the hardware, especially if the cover is damaged, they will be thrilled to sell them.