I must clarify my negative response.
I think steps are a great idea. I was so excited when I found them at Walmart. I read the entire box trying to find out how tall they were and no where on the box did it say. I bought the steps in good faith thinking that they would at least get the kids within jumping distance of the bed.
When I opened the package and found that they didn't, I was disappointed, the certificate to send off and buy what would make the product "workable" is what really irritated me. So we are back to using an old trunk with a pillow on top and covered with a blanket to keep it from sliding.
I think FastEddie is right on the money. The best option is to measure and make your own!