I would say you'd have to get it matched myself mate...Honda will know the code but wouldn't publish it. If they don't tell code it covers there own backs legally, cause in there eyes you could be repairing a knackered wheel and they wouldn't want any responsibility for that. Its daft but can also see the sense in it. Still might be worth sending them an email cause im not 100% just my thourghts, just say you need to touch up a scuff or something.