HPE Proliant DL80 Gen9 - BIOS and firmware update

Hi everyone.

I recently got a DL80 Gen9 to replace my ML310e v2 Gen8, but I've run into a bit of a snag with not being able to access certain BIOS and firmware updates from the HPE website where I used to get them with no problem for my old Gen8 machine.

My BIOS is currently on (U15) v1.40 (05/06/2015). I can find the files for other Gen9 machines like the DL360 (P89), but not for my DL80, so I was wondering if anyone could help me out with that or point me in the right direction.

I know I can update the BIOS + everything else via the SPP updates, but I don't think anything has been updated on this machine since 2016ish as far as I can tell, and I read that the SPPs have to be installed sequentially, not jumping to an SPP more than 12-months newer than the last. So, I'm not sure if I'm going to be able to find the 5 or so SPP updates to be able to do that... or is there any chance it is okay to just jump to the newest one? Any advice would be greatly appreciated.

Many thanks in advance!