http://fallout3nexus.com/downloads/file.php?id=4309
In fact, that render you posted is from the above linked mod.
Keep in mind though, that the description states it as a "work in progress" and "unfinished" in so many words without actually saying that. So, it may or may not be exactly what you are looking for.
That one linked.... well I can't really say anything good about the model.
you will have to edit the nif, the texture paths are absolute to g:\games\ folder. so thats at least one thing...
aaannnyway...I want a decent gas mask. no whack crap. So what is this one in FWE, any good?