They'll be useless in game, but about Gmod and SFM, they'll be very welcomed

The files are not of much use unless you're willing to mod the game which most people won't bother to do ... especially for a game that's as old as TF2.

Thanks. I'll work on it asap and I'll release it as well [and I'll credit you (obviously)].
Honestly, I wanted to send you the friendship request because I thought you wanted to give me the files in "private" (since usually stuff like this, is given in private)

Bullbomb HL2 files:

https://www.dropbox.com/scl/fi/tjtnojguub735ntapc12u/bull_zip.zip?rlkey=y3uh7oevop6jnuqyprkxjxq8b&dl=0

Even just the model will be fine. I could decompile it with Crowbar and do the rest by myself (mainly because I don't want to bother you, because I'm pretty sure you're busy in real life and such)

I have no problem with that. The issue is that finding the old model files is going to be a chore. I would need to pull my old hard drives out and search for the original source files.