Brake Parts for a GEM E4 2009

I know a list of parts for the brakes has been listed before…just cannot locate it. Please relist the parts and recommendations on where to purchase. The rear brakes on my “Wilma” are in need of replacement.
Can a brake company do the work, once the parts are in hand?

NEV’s parts…

search in List of alternative and suspended parts here. I have used it several times.