Getting something looking exactly (or close to exactly) like his stuff might not be easy, but chain mail is easier to find (here's one I found from Google):
I used to be heavy into knives, swords, etc., and knew several different places, some that had medieval-inspired fantasy clothing closer to what you're wanting, but I can't remember any of 'em now. [img]/ubbthreads/images/graemlins/frown.gif[/img] If I run across any of 'em, I'll let you know.
Also, there's another Sam here (darkleather, I believe is his username -- somebody please correct me if I'm wrong) who makes really nice leather outfits that look fantasy-ish. You may try looking him up, too.
Hope this helps some!