Hello Anthony Carracino,
Thank you for choosing to soften the concrete surface which would help prevent health problems down the road. Many people have hidden intrinsic issues even the doctors don’t pick up on until symptoms occur.
You may get some great insight speaking with the gymnastics places’ and schools’ staff. Those places have great flooring in their activity spaces.
I would also do as the others suggest…
check out every floor and fitness supply company in your area along with the sites listed here.
Thanks again for taking care of your clients.