'59 Fleetside "Tie-down" brackets?

[Tod59]

Hey Guys-

On my '59 fleetside box, there are 6 small holes on each side (see picture of 2 of them). I seen a picture on here of another members 58-59 fleetside truck and the holes look like there were some type of "tie-down" brackets on the bed.

Is there anyone remanufacturing these "tie-downs", or where could I get a set? If they are unavailable, I may just fill (weld) them closed.

Any advice or help much appreciated.

Thanks
Tod