In the mean time
You can take the starter off and clean up what's left of the contacts. Disconnect the batterys, disconnect the wires from the starter and remove the 3 bolts that attach it to the truck.
Remove the fasteners that cap the end of the solenoid and you will see the problem. You can flip the disc and clean up the contacts with a file. Don't take too much off. This will get you through until the parts show up (or longer).