Here are some ideas off the top of my head...
MMA Boxing is more steady state, so if I were you I would just sub in any steady state cardio, like Athletic Step, Step Moves, Rhythmic Step, Slide & Glide cardio, etc.
Kick Max is mostly steady state but does have about 15 mins of intervals, so something like Step Blast would be comparable (since it's mostly steady state with a "blast" thrown in at the end, which is a good 15 mins of huffing and puffing). Or Imax 2, since it has intervals but isn't as killer as Imax 1 or 3. Or the step routine from Body Max 2 (including the cardio leg drills).
Obviously you could also sub with a workout of your choice, like running or cycling. Just keeping it more steady state for the Boxing day and including a few intervals for the Kick Max day.
HTH!