Nancy if you got a step I'd rcommend one of Cathe's old ones. MegaStepBlast, it will get you sweating but it's really easy to follow. So if you have that two left feet problem, this is a pretty good one to get, if you don't already have it.
I think most of the CTX straight workouts are 60 minutes, but with the pre-mixes, there is one that are only 40 minutes. But it sounds like you need a customized Cathe workout for you. I actually did a mix and match Cathe for a client as she was going on vaction and only wanted to workout 30 minutes, but wanted a hard 30 minutes. So I talked her into doing Cathe. Now she collects Cathe, and she sees me 3 days a week, and does Cathe the other 3. I should see if I still have it on my computer or on a back-up. You may find it useful, as all over them were under 35 minutes, with warm up and cool down, and workout.
Kit