Have you asked the gym management to buy one for the gym,
Gyms aren't against that kinda thing. Write something up that explains why they need one. Give it to a manager..then send one to corporate
Your gym owner probably even has access to one and thinks nobody would want it so never put it out
My gym owner has tons of strongman stuff in storage and whips it out if questioned...
Try that first. If it doesn't work. Buy one and just let it be the public use kinda thing. Your gym may even let you ride on your monthly dues for stocking their gym with a new piece of equipment.