Hetty, I got the green square planter from eBay. I noticed that Bed Bath and Beyond have it online, so you might want to check their store if you have one close.
http://www.bedbathandbeyond.co... They were hard to find here last year too, but I found the black oval one in the photo above at a little greenhouse that sets up in front of a grocery store every year. They also had a round low one. I think as succulents become more popular, they will be easier to find.
