I have but it is at my son's house. All you need is a 2 X 4 and some sisal rope. Mine LOVE that sisal rope and will scratch on that anytime! it seeems to attract them, no encouragement needed. I will post the perch I made so you can see the sisal rope. If you are "building impaired" like I am and just want something right now...do the 2 X 4 and lay it on the floor where it is convient to them.

I found a building store that sells it by the foot and it was about 5 cents a foot... It takes a LOT so I would start with about 200 ft. I used spray gule to hold it on there then tacked it with nails every now and then.