My friend's F-150 was hit and he's wants to replace the standard bed with a Flareside bed.

Does anyone here know of a place in central FL that sells used pickup truck beds?

Try companies that fit trucks with utility bodies.
Heintzelmans Ford or any truck dealer can give you the name of the companies.
Sometimes thay have take off beds leftover from installs. Most will probably be slab sides though.

Exactly what I was thinking.