Hey, I love the FIRM too!

Since I live in canada , when I bought the new three tapes it was only available with the fanny lifter, but...

I know other people who have bought a rubbermaid step stool. its not quite as high as the 2 fanny lifters together (14" ) but is about 8" . Actualy I use the blue part (8" ) of the fanny lifter for many exercises as I find the full 14" step too hard on my knees.

Check out Walmart...should be under $10 and is quite stable!