Anyone here do metal roofing?

[Slim]

I recently bought a house with a nice shed in the back. Problem is the left no overhang at all on the front side of it so all the rain water drips straight down into the door entry rotting it out. I am almost positive it is PBR roofing. Hoping someone can help point me in the right direction to getting some small 4' panels so I can add the overhang to it.

 

[Kook]

PBR has high ribs 12" O.C. 1 1/2" thick. PBU has same height rib 6" o.c. 3/4" thick. PM me if you need help