Weatherboard or lapboard (Summertown OX2)

The sort used in fence panels or to clad sheds. I have made the framework of a small log store and want to clad the back and sides. Offcuts from a fencing project - or salvageable (ie non-rotten) wood from an old fence or shed would be fine. I need to get 80cm lengths for the back and 50cm lengths for the sides. It will take 12 or so overlapping boards to cover each surface.

Does anyone want to get rid of anything that might work ?

Many thanks for reading this