E1TZ 10756-C

This is the J-bolt used to hold the battery to the fender and radiator support.  I'm pretty sure this isn't really the right one as it was a "D" prefix and ours take E1TZ 10756--C.  But, it will suffice as what the part should look like.  As for sources if you are really wanting the truck to be original, just Google E1TZ 10756--C and you'll get plenty of hits.