Like Corsair, I have bolts holding mine. Well actually Phillips head screws. I would take one to your local auto parts store or hardware store and see what you find. Maybe they can order you something if they don't have it. You can also try a fastener company like Fastenal if necessary. From what I can see of the bag they look OE but not sure on the bolts. Only know what is on mine.
2006 V-Star 1100 Classic
Silverado windshield and passing lamps
OE Highway bar with custom mounting brackets
Kuryakyn Dually ISO Highways pegs
Barons Nasty Boy Slip-ons
Kuryakyn led headlight halo