Air cut-off diaphragm needed

I just picked up a 2000 650r and in the process of going thru the carb I discovered the diaphragm is starting to look a little...old. The rubber is delaminating, no holes or cracks thru yet though. My question is, does anyone know if you can buy JUST the diaphragm? My local dealer and bikebandit only sell a "kit" which include the sideplate for mucho dollero.

Thanks for any help!

You should read this before going any further - Borynack Carb Fixes

Maybe it will help or at least send you in the right direction for parts. I needed the same thing for a CM400E and Bike Bandit wanted $70 bucks! I looked long enough online to find what I needed for under $20 shipped.