Fender extending

So I would like to step the tiburon fitment game up a little. I would like to get any opinions or advice on how to go about extending the fenders on the tib. I am having a very hard time finding anyone to do this so this might not even be a go.

Fiberglass extensions-








The sheet metal method looks exact the same as above except sheet metal is welded together inside of fiberglass being laid together.