lockI assume you know given your enthusiasm but they've basically converted the simple hud from the jedi knight series into tf2, the kill sound they use is the new chat message sound from the games. So that could help you source the other elements like fonts, graphics, etc.
Pretty well done, giving me a big hit of nostalgia.
https://mrwonko.de/jk3files/screenshots/b6d503d8d03a6481982bfab140f1264bb511eacc.jpg
yes this i have noticed and have tried to delve into the root files, but to no avail, the game is formatted so strangely. so any more assistance is appreciated, i will give the vtf thing a go (even tho i dont wanna haha)