outdoor climbing/activity post

[JKayB]

Does anyone know where I can buy an outdoor wooden climbing frame/posts for cats?
I saw them at a cat show but lost the contact details. You could have either 3 or 4 tall crossed poles, depending on the design, with a large platform on top and several smaller ones, like steps, on the poles at different heights. (to help get to the top). It was a brilliant idea for use in a pen.

[Elfin]

There is one type here: http://www.stusanimalhousing.co.uk/catruns.htm