I have been thinking about using Sugru to prototype something similar to this for about a year. It would work with webbing, amsteel, or rope, allows for bridge roll, and also allows for easy on and off. Forgive the hand drawing, but should show the concept. Green is caribiner and orange is the bridge.
I did make one out if PVC pipe and it worked, but needed more refinement.
A flexible, adhesive repair putty that sets strong by turning into a durable silicone rubber. Perfect for craft, DIY, upcycling and hacking your stuff.
sugru.com