Ok I'll do a few from the top of my head that I don't know (or remember):
Urban Hatemonger - 36ish
Right-Track - (I don't have access to any carbon-dating tests at the moment, sorry)
Number9 - A solid 19 and a half
Thrice - 24ish
Crash - 26ish
Mr. Dave - 30ish
Rickenbacker - 18ish
Annnnd I'm spent.