Pam:
an easy way to get that Circuit Max feeling is to combine several of the CTX cardios together, back to back. Especially All Step, 10*10*10 and the one with the leg drill circuits can't remember its name (maybe Power Circuit?). These workouts are from the same era as Circuit Max and have the same style and music type and degree of difficulty, especially when strung together! This is what I used to do and I loved it. Give it a whirl. Do you own CTX?
I think also Drill Max is similar to Circuit Max?
Clare