2x3 Rack J Cup Protectors (PRX and Titan T3)

Untested on Titan t3, however I think it will probably work. If you do not want to print check out Aperture Engineering's Design, he sells fully printed models and supports many other configurations and accessories.

I have attached solid works file and step for anyone who wants to make modifications. I will also be uploading a 3x3 rack version, but it will be completely untested as I do not have a 3x3 rack.

https://shop.apertureengineeringllc.com/

He also has some free models on thingiverse:
https://www.thingiverse.com/apertureengineering/designs

Installation:
Remove screw
Attach part,
VHB tape the underside to the hook (optional)
Reinstall screw 

Print instructions:

print in default orientation. Use max perimeters no infill. Use high wear resistant filament such as delirin, Igus iglide, PC, PETG. Try to avoid pla and abs.