1975 K5 Prep for softtopper

[eighteenninetytwo]

I bought a white softopper for the 75 a few years back - haven't got round to putting it on but 2023 is the year I think. However, the frame for the softtopper bolts into the threaded sockets that the hard top uses underneath rails of the bed and not all of mine are serviceable.

Has anyone replaced or repaired these? I figure I'd need to drill and tap some small slices of steel plate but not sure how I'd fix them in place.