[Half-Life] Original Half-Life grunts for Opposing Force ? Thread

Hello,first of all, sorry if my English happens to be terrible, I'm French.

Anyways, I came here to ask you guys something specific. I don't really know if this thread would fit better the request section so, I preferred to post it here just in case.
Just because a picture's worth a thousand words : Cdn4.steampowered.com

Although it may sound weird considering how ugly valve grunts might be to many, I am willing to use them back instead of using the newer OPFOR grunts.
Why ? Because I'm a huge nostalgia fag. I even still run the game on software settings.

Joke apart, I tried to do it by myself, but I miserably failed (the MP5 grunts happened to have a shotgun, bones were fucked up ...)
So, I decided to do various researches and came across : Hl-improvement.com Hl-improvement.com, a guy called Marphy Black managed to do it properly on hl-improvement. The only thing is that :-The site's dead, it's no longer possible to register-The link's dead as well.So, I am asking you :Can I find them somewhere ? If not, is there a simple way to properly convert them by myself ? Or do I need to make a request on the requests forum ?Thanks in advance.