I would like to get a copy of my key, I have a key computer lying around but I cannot find any keys for sale apart from second hand ones, are second hand keys reprogrammable?

Nope, you must order a new key using your VIN from Skoda dealer.

There at least, used to be sellers of new transponder pellets on the internet in UK, I bought probably a used but "new" for both my previous VW's so that meant receiving new looking keys with blank blades, I never ever completed that task, although I did find a security company that did sell unused transponder pellets.

One thing, rumour had it that any/most "used but newish" keys ended up being fitted with blades made out of a harder material than VW Group's key supplier does, so that could annoy a key cutting machine!