It's difficult with Oakley watches. Most watches use a spring pin to hold the band to the case. But the killswitch and many other Oakley watches use a pretty large allen head bolt/tube combination compared to the average watch. So finding a metal band that will work is going to be difficult.
I have a couple of leatherman bracelets at my store... keep thinking it would be cool to put one on a MM or HP but have never found a MM or HP my heart would let me put a non Oakley bracelet on it unless it came from @Spenc