Take a look at Furez - they have different cable sizes and two flavours - set screw mount and crimped...
http://www.douglasconnection.com/Furez-TSTSB40Ag-Silver-Plated-Copper-Banana-Plug-Connectors-Pair-FZ...
I’ve tried the Silver plated set screw model and they sound excellent, but because they are pure copper (not a copper alloy) they can be easily bent if accidently knocked, but then you can bend them back with no problem
KLE Innovations also uses some very good Bananas, but you’ll have to email them for details - they are not on their web site’s product list as yet.
Good luck on your quest
http://www.douglasconnection.com/Furez-TSTSB40Ag-Silver-Plated-Copper-Banana-Plug-Connectors-Pair-FZ...
I’ve tried the Silver plated set screw model and they sound excellent, but because they are pure copper (not a copper alloy) they can be easily bent if accidently knocked, but then you can bend them back with no problem
KLE Innovations also uses some very good Bananas, but you’ll have to email them for details - they are not on their web site’s product list as yet.
Good luck on your quest