I never understood why a focus ring has to cost ridiculous amounts of money. Even the rings from the manufacturer of my budget follow focus, DFocus, makes focus rings that cost 30,- albeit that one size supposedly fits all (lenses). But ideally you don't want to mess with taking them off and readjusting them to a new lens every time you go out for a shoot.
So you basically want effective and affordable gear rings. Enter Half Inch Rails with their zip-tie solution. 40,- for a set of 4 gear rings. Just placed an order.
HIR Zip Tie Focus Gear from Sam Morgan Moore on Vimeo.