That's quite a story. It would be fitting to restore it to the condition it was in when you sold it.
If the construction of the cabinet is like that of my E48-2 that top is probably a thin piece of Masonite which is easily damaged by moisture. From the look of the top I'm almost 100% sure it is. In that case it's better to just cut a new piece, apply matching laminate and glue it in. I have to admit their construction is the worst I've seen but if the rest is solid it's worth a go.
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