What are the most durable, longest lasting backing plates for the 7424XP?

[Shine E]

What are the most durable, longest lasting backing plates for the 7424XP? I will be using mostly a 5" to use with 5.5" pads, and 6 inch backing plate to use with wool / MF bonnet combo to remove wax. Thamks

 

[C. Charles Hahn]

I have a couple Lake Country backing plates that I've had for many years that are still going strong after buffing a few hundred cars....