the stock setting on the bandit is a bit rich so re-jetting shouldn't be neccessary unless you change airfilters (good luck finding an aftermarket one)
I put an ART stainless can on mine and it sounds lovely, but any slip on can will go on.
you'll have to hacksaw the original headers though, so if you want to avoid doing that maybe try to get a set from a breakers , city spares are in dublin and usually have a few bandits in various smashed up states.
before
after