No luck with the panasonic codes however I've made some progress elsewhere.

I've used my original JP1 compatible remote (URC-4160-b0,similar to the 7560-b0) and found some setup codes that cause some response for the tuner/amp module:
0331 Volume
0541 Power
0786 Power+channel selection(number pad)

Can anyone explain how I can use these to identify the protocol/Device ID/EFC details for the functions that work?

I'll develop a layout in remote master, save it to my old remote and then learn them on my new remote.