parts cleaning

I am working on a 1970 xs1 650's carbs, and I've run into a little problem. I can find the kits for em, but none have the diaphragm I need. Anyone know where to find that? I looked on partzilla, and they are "unavailable". Part number is 256-14916-19-00. Any help would be greatly appreciated.

Today, I bought a brand new propane-fed turkey fryer for $15 at a yard sale. I have absolutely NO interest in ever using it for submerging a turkey in molten oil. I guess my XS650 Dementia is in full bloom, because the first (and last) though I had pertained to a motorcycle part related use...