Kristieb726, I ordered directly from their site years ago, and it was an add on, they offered it when I was paying, they also tried to sell me a dvd and weights, but I didn't add anything and still I got the dvd they were trying to sell me! (that one was not listed on the rotation. I did my seat pad on my own, I had wood, so I asked my DP to cut it for me, I bought a padded foam from the dollar store and bought some vynil-cuir, mine looks exactly like theirs. HTH
Eta: I do have a question though, you said your Lebert Equalizer doesn't folds up (they are two separated bars, so no need to folds up

), for the design of it I guess it shouldn't take that much of space? I'm attaching pics of the seat pad we did at home.