GSXR wires are fine, you are really just harvesting the connectors. Most common modern sport bikes use a similar system, I would just search R6 coils (or gsxr or cbr) make sure the auction if for a full set as they like to show four and make the auction for one. You could search coil harness, ignition harness under motorcycle parts and filter by lowest price, thumb through until you find one that looks right.
If you're unsure, post a link to the item or items, I or someone else can have a look for you...