I am on my third email address...
I honestly couldn't tell you the name to the first one I used, never mind the password...
I presume emails are still sent to it...
My wife uses my other one for ordering off the internet but I haven't been on there for 3 years at least...
Plenty of people will change email addresses from time to time yet still recieve lots of messages to the one they no longer open..
Personal websites usually have a direct email, or even a mobile of either the person themselves or whoever is managing their website, so usually a close associate.
If all else fails, then maybe contact a riders club, every club has an email contact with some personal ones, who would be more than pleased I would think to see their man gain some better kit through sponsorship..