No easy fix. I think Bud’s method is best option. Keep in mind that the plug, if it was done right to begin with, is attached to the deck glass with an H pattern of resin, and possibly filler. Square out a rectangle of material and remove it all, sand the area around the edges down to the weave, replace the rectangle with a tightly fitting foam insert, gluing it in with lam resin to the deck skin, glass over the whole area, fair out the edges, tape off, hotocat, install new plugs per manufacturer’s specifications.