2" x 1" and 1.5" x 1" (38-50mm x 25mm) Wood Battens (Charlton SE7)

I am looking for battens roundabout the sizes in the title with usable lengths of 6' / 1.8m and longer. They don't need to be perfect as long as they are not badly cracked, not rotten except for both ends or dried out. I am asking due to the local supplier not having any in stock.