I can build something like this... Amazon.com: Wall-mount Storage Rack for Inflated Exercise Balls, Holds 1: Sports… | Ball exercises, Ball storage, Stability ball
Amazon.com: Exercise Ball
Amazon.com: Large Exercise Ball
Active Balance Exercise Ball with Resistance Bands & Hand Pump – Premium Balance Ball for Fitness, Health, Relief & More – 55-cm No-Slip Stability Ball by Epitomie Fitness Black : Amazon.com.au: Sports,