Here is the best of everything I've been able to find online. First, the best depiction I've found of the gunfight at the OK Corral:
link
Fly's Boarding House & Photography Gallery
Front:
Side:
(also shows front of Bauer's Meat Market to the left)
Rear of Harwood & Fly's:
This is a model of Fly's, which includes the photography studio in the back I have no idea how well researched it is, but it's the only image I've found online that shows what the studio may have looked like:
linkPapago Cash Store & Bauer's Meat Market
Front:
Halfway down page:
linkBEWARE OF THIS PAINTING
link
Although it purports to show the gunfight location, it's based on the photo above, and the buildings are actually the Papago Cash Store & Bauer's Meat Market, astride the back entrance to the corral.