I can't really help with your original request. But I'd like to say, your dance group sounds fantastic. My late mother started a tap dancing troupe of retired women - some of them had never danced in their lives but managed to learn to be competent and enthusiastic dancers in their seventies.
I presume you are aware of NDT 3 - part of the Nederlands Dance Theatre made up entirely of dancers over 40. I once saw a performance of theirs on TV, where they danced to early Bob Dylan music. It was absolutley wonderful - maybe some Dylan might be suitable for your group.

Good luck, I wish I could get to see you, but I'm in UK.

Shelley