Just wanted to share this link for all you bugaboo owners who's wheels are on their way out:
webshop.bugaboo.com/UK
My frog front wheels are dying and all the eBay offers were extortionate. I asked Bugaboo if I could use cameleon ones (as these are easier to find), and they directed me to their spares site (didn't some up on any searches I did).
Hope this helps someone x