$300 · Wanted: long metal slide / long plastic slide

Wanted: a slide similar to the one in beacon hill park in the 90’s. It was long, narrow, tall and made of sheet metal. Does anyone have something like this they want to sell. Our new deck is 7-9 feet off the ground, or a spot that is 20ish feet tall also. Can’t find a slide that goes off a deck that is that tall. All I find is 5 ft deck slides. If someone does custom sheet metal for a use I would consider that if it’s not to crazy priced. Could be a single wide, or double wide. Looking for something fun. It could be a plastic slide if it’s long enough. Thanks all.