We have 4 perches/stands. Only one was purchased. One is the one I explained above...with the TV tray. The other two were made from Christmas tree stands. My husband got two sizes. One small and one large. He put a wooden pole type thing in the small Xmas tree stand and then screwed a wood thingy to the top of the pole. Here's a picture of the top part.
Here's the top of another one where we used a Xmas tree stand..I couldn't find a pic of the whole thing, you can use your imagination. My husband used a really thick branch to put into the xmas tree stand and then tied the top part on.
We have the purchased stand on the living room...the TV tray one in one of the bedrooms where I spend a little bit of time...then the Christmas tree stand ones are here and there. They move around a lot. I can't wait for her to get used to the one around my neck!!!