Good news by the look of it - SEAT UK have stock, but parts are not yet orderable.
Im guessing they are going thru the evaluation process so I will keep tabs on the situatiom.
Cost likely to be £13 each based on RRP of £16
Could well be that they are OEM'd by Keyart of Japan. In which case they clip around the existing keyfob.
http://keyart.jp/aboutkeyart.html
Looks like swapping out the insides of the fob and blade, really easy to do, I've already renewed my key with a casing I got off eBay.
Yeah, under the badge is a small screw which allows the fob to split in half. The one thing to be aware of is in the part above the three buttons is the immobiliser chip (I think), a small capsule that needs to be swapped over too. My new oem casing only cost £7 off fleabay, so for £16 I would not expect these to be a simple clip on cover.
If you look at the pics it seems to be a clip on cover - the badge is recessed in the hole, as are the buttons.