Aha, thank you - good to know.

Had a quick google and yay - https://www.amazon.co.uk/Magnetic-Compatible-MacBook-Reversi... - though that was one of the first links that jumped out, nice picture of what it is, but if your getting one, do look around more as probably better or cheaper options.

Make sure they don't fry your power adapter - some USB-C magsafes like to do that upon disconnecting the cable from magsafe area.