Steam Wallpaper Stripper missing power cord (Leith EH6)

I bought this new, and after use has been stored for a few years. I've managed to lose the original power cord. It won't take a standard kettle lead as there is a notch in the socket, see photo. I've searched online and cords are avaialble for between £6 and 10. no reason to think it's is not still working fine. I've tested the continuity and that is good.