I hope somebody will jump in here and correctly me if I'm wrong but most of the stuff/accessories you see on the anniversary bikes are special order only. You have to have a serial number and proof of ownership of an anniversary bike to get the item. I know this to be the fact on the '95 Anniv. bikes. Also know for a fact that the decals on the '03 Anniv bikes are special order with documentation only.
Have seen several examples of items like 'chrisjanes' pointed you to to be the only one you 'joe public' can buy. The ones on the '03 Anniv models from the MotorCompany are as I indicated above.