UK I'm not sure if this is the right place but.....

Here's a recent thread about sourcing them in the UK https://guineapigcages.com/forum/showthread.php?t=4394 and another https://guineapigcages.com/forum/showthread.php?t=4556.

Good luck, it's such a pain they're so hard to get hold of over here.

hi sawda im a member now
have a look on ebay

Have you got a link for someone selling them on eBay? I know they were available before but they sold out and the person who was selling them hasn't got any more stock coming in any time soon. A shame as they were at a really good price.

Check out: (broken link removed)

If in london - gonna be expensive though as they are shop fittings..