1982 KZ650 CSR Carb Diaphragm questions and questionable mechanic?

Here is a pic of all the parts that are "missing" thanks to that "mechanic friend" who unfortunately is unreachable.

I am pretty sure that some of these parts can be sourced with a rebuild kit but what about that needle jet?

Any suggestions are of course well appreciated !

If the needed parts can't be sourced, you could get a replacement carburetor off of EB or something. I didn't see much right now, though.

No eBay APP ID and/or Cert ID defined in Kunena configurationConsidering the extent of the missing parts you may have to gamble on the quality of these kits...

Thank you !

Just ordered it and will see how well it works out.