Hi
I think you could explore Nedi and create the HP defs on your own!
Remo has made a great tutorial:
https://www.youtube.com/watch?v=bunFHB-RoUQ (referred at
http://www.nedi.ch/documentation/expand/ which is also a good read).
Most likely you can just copy 1.3.6.1.4.1.25506.11.1.82.def to 1.3.6.1.4.1.25506.11.1.167.def and do small tweaks to pull data from 1920-24g-PoE+.
Same for 1810-8G: try to take a copy of 1.3.6.1.4.1.11.2.3.7.11.151.def and use that as starting point for 1.3.6.1.4.1.11.2.3.7.11.158.def.
And something like 1.3.6.1.4.1.11.2.3.7.11.166.def as the starting point for 1.3.6.1.4.1.11.2.3.7.11.170.def.
In the end the HP defs are very similar, depending on whether the device is Comware OS or ProVision OS based.
Then continue with the Hirschmann devices and once you're done with the defs, share them on this forum
Don't worry on getting things perfect the first time. First get Nedi to pull snmp data from the devices, then maybe look into libcli stuff to get cli access and backups of the configs.
Br,
Hannu