HAMEG HMO722 Firmware needed (Please Help)

[DJ_JAM]

Dear EEVBlog forum members,

Half year ago, I bought a used HAMEG HMO722 Oscilloscope and I'm trying to update the firmware.
Unfortunately, I can't find the right firmware.
I checked R&S website support page and old HAMEG site archive, but there is nothing about this device except user manual.
The latest version of firmware I found in release notes is 04.531.
I tried to find in Internet any version of the firmware for this device unsuccessfully, so I gave up.
My last chance is if someone in this forum have an archive with firmware for this device to be so kind to share it with me or send me a link from where I can download it.
Please help.

Thanks in advance and best regards to all of you!