Kage2020? Thats a name I've not heard in a long time.
He was active on here many many years ago, like me he started posting actively here after Portent disappeared.
I used to talk to him a lot and chipped in a few submissions on his lore project. But I last saw him on a (now disappeared) forum devoted to the 40K tabletop RPGs when they where produced by Fantasty Flight. He seemed somewhat burnt out towards GW at that time,at least 10 years ago, probably longer.
What sort of stuff are you looking to find?
Edit: Hey, his profile was last active Jan 2024! Could try messaging him on the board, the system might email him a notification?