Older ford trucks used the same 5 lug pattern as Jeeps did,but I think there are 2 different ones,5 lug 4.5" and 5 lug 5.5" pattern..
If you have any old junkyards or places that sell OEM wheels in your area you might score four rims there cheap..around here you'd be S-O-L as far as finding any used ones,most of the old boneyards are history.. craigslist or swap meets here are about your only source of old parts now..