lowboy or horizontal ~50gal solar storage tanks?

[gwisejr]

I'm trying to find a solar storage tank around ~50 gal that will fit in my crawlspace. Can anyone point me in the direction of one? Either a lowboy type or horizontal. Just need one heat exchanger coil but would be nice if there are models that have two heat exchanger coils.

Thank You.

 

[Colombiano]

My neighbour could make you one to size, where do you live?