I'm looking for a mod that adds a http://www.totls.com/A%20SS%20GEN%20PEAK%20CAP.jpg to the game (preferably black and not a Nazi hat) but I can't seem to find any, is there one out there?

why post a picture of a nazi SS officer hat, if you don't want one. < post a pic of the flavor hat you are specifically looking for.

You can more or less get one by retexing the police hat ingame (http://img152.imageshack.us/img152/3321/commissarcap.jpg). And along those lines, the easiest way to find one's probably going to be looking through the WH40k mods, as they're likely to have Commissar hats. Also nifty black greatcoats.

Something like http://www.russianlegacy.com/catalog/images/hats/FRZH010.jpg except black.

Sorry, but that made me lol. We go from Nazi to Soviet. Anyways, it should be too hard to make it it comes to that. Why not give it a spin yourself?

Maybe a recolour of General Jing Wei's hat would do it.
Operation: Anchorage.

Your pic looks very similar to his hat.

I'd ask for something like this
http://www.marlowwhite.com/images/catalog/05-310-GO-hi.jpg

Why? What's wrong with a Soviet cap or a Nazi cap? Well, I mean, the brim on those ones look better than that one.