Cleat Repair

[BookEm]

I had my stern cleat pull out. The bolts were machine type. I was told when they build these boats the cleats are set on before the 2 pieces ( top and bottom) of the boat are put together. There is no way to get behind it to rebolt it. I have been told I will have to fiberglass it in. I have done small fiberglass repairs on my boat but nothing to be proud of. It almost looks like the holes were tapped for the screw threads. Any ideas. Thanks.