Following on from the JBL fest in the "vintage ads" thread and to avoid going too far off topic over there, I thought it might be worth starting another thread. Based in Japan, Kenrick Sound have made a name for themselves restoring JBL 43xx series studio monitors. They provide a ground up rebuild service, or will custom build from scratch.
http://jbl43.com/
Their work appears to be quite impeccable.
This is another one of those websites I wish I hadnt found.