Hey Becca,
Our Target has them - right next to the cots and carseats I was looking on Sunday. I am waiting for the sales to buy one, or might suss out some on ebay. I'll need a stand too, as we don't have door frames in useful spots

A friend of mine has a "tippy toed" 7yo son, possibly from extended Jolly Jumper use - he has had to have plastered legs etc to fix the problem. I will definitely be limiting my DDs use to about 20 minutes a day, but I just know she is going to love it - she wants to be upright ALL day...