I think the olympic rings are a protected trademark. You can´t use them unless you got the specific approval of the ioc. That´s why there´s no olympic jersey for cyclists.
Yeah, Vino also had to change jersey to his regular outfit before he could start the 2012 San Sebastian.
I remember Paulo Bettini sporting a custom Olympic Jersey after winning gold in Athens 2004. In my memories it had the iconic five rings, but it apparently was just gold(ish). I think he just wore it at the Zürich Metzge, after which it was banned by the UCI/IOC.