Okay, so it's a 2002 G20. I did not find any in the part out section and on "everythingg20.com" they have don't have the color for 2002. Are any previous year models the same exact fit and color as the 2002 aspen white pearl?
try car-part, search for "Mirror, Door" for an 02 g20...you didn't specify left/right or heated but I checked quick and found some. Finding your color may be a bit more of a challenge, but someone should be able to paint it for you inexpensively (relative).
also, everythingg20 is a dealership so anything a dealer can get they can get. You should call them and ask them for a price, I'm sure it'll beat your local dealer plus they can likely get the factor matched color (even if website doesn't show it). Have your VIN/color code ready...The color code is inside the engine bay against the firewall on a placard.
I called and asked for Justin. He had no reaction to me telling him that I was referred by this website. And he has the mirror but can only send it unpainted. Thanks for all the help. I think my friend will save around $20 if she decides to get it from the site.
If you want, you could probably get a painted one from a forum member for dirt cheap. Just ask around... I grabbed a side mirror assembly from MrFancyPants (greg) for around 70 dollars shipped. He might have the drivers side still.