Critter Nation cage in the U.K.?

Hi! To anyone in the U.K. who has a Critter Nation double/deluxe cage, how on earth did you get a hold of it? I desperately want to get my two girls an upgrade and adopt more friends for them. I heard that this cage is the best on the market but is impossible to get a hold of here.

How did you manage to purchase it?

Also, are there any good alternatives within the same price range (ideally with the double cage doors that open fully for easy cleaning!)?

Many thanks!