Gosh I love RV.net. You all saved me big dollars and pointed me to a good supplier. Being from a generation who loved rotary dial phones and a computer/cell phone hater, I have trouble finding things like this on the internet.
So, ordered 4 backing plates/shoes from etrailer for about $120. I've done lots of brake work on cars, trucks and trailers, so I can see how easy this should be.
Thanks all
(Little edit here, of course without the computer I couldn't access RV.net nor get the help I need, so it's hate-love)