The original sketch is the only one in the world.
Marty, who also worked in the music business, was best man alongside Joe Esposito, Elvis' road manager and friend.
“It took me eight days and five hours a day. It is a slow process."
The pair had been trawling the river bed for an hour on just their third outing magnet fishing when they caught hold of an object.
Neither had achieved a hole-in-one in 15 years of playing together.
“It’s such an iconic image of her that I just had to do it. It's one of her most famous pictures," he said.
By Adam Dutton and Michael Eden via SWNS A dad has left medics baffled after waking from a coma with extraordinary artistic talents he never had...
The location of the castle in Wales is shrouded in mystery for security reasons.
"We had no idea it was a first edition until years later."
Spooky photographs show limbless mannequins and random body parts scattered across the site as well as other dummies arranged in sinister poses.