I have a complete list as does Heather. When Don left the scene he gave me the entire exhibit library and a bit more. I shared this with Heather so there is not as much lost as you think. Probably more people as well have additional info.
We also have complete set of service manual discs JBL and Urei.
If you need a particular schematic put up a post.
You can also do this and query at the JBL Service Document Portal Posted in the Technical Sticky Thread in 2021 Search Discontinued in the drop down menu.
https://assets.harman.com/portals/wo...sfp=1135167407
Not all are there but some are.
Rob