Most regular "mini-staples" should work,
regardless of brand. I have a few
that I use in briefcases, my son's semi, etc and we pick up generics right
at Walmart, Kmart, Dollar Store, etc.
Swingline and Bostich are just enough different to cause jams etc.,
Swingline is what everybody thinks of as a ministaple and what everybody
carries, but that does me no good.