In reply to Traveller:
> Does anyone happen to have a set of the contour kids binding adaptor for sale second hand?
I haven't got that specific one but I have a pair of Securafix binding adaptors that may fit a child's boot.
I bought them from a shop in France this summer which was having a clearout for £20. I misunderstood the size label on the box and so they are too small. They are to fit boots with a sole length of 23-26cm (I misread the size to mean ski boot size 23-26 which has quite a bit longer sole length).
They look like this
https://www.ricardo.ch/de/a/secura-fix-touren-bindungsadapter-1110697846/
but a different colour and are unused and in the original box with a storage bag. They don't have skins though like the ones you asked about.
I was going to stick them on ebay but you can have them for the £20 I paid if you want. I can send you a photo of the actual bindings if you're interested.