Where can i find a side mirror / how much...

I just took out a mailbox today backing up to fast, hit something in the road behind me and it was all over... took off the side panel strip on the drivers side door, dented it a bit, and i have a nice piece of my drivers side mirror missing, the outer shell is fine, just the mirror is fucked, can i just get the mirror part or will i have to get a whole assembly, also how much would it run / where can i find out?

What color car and its a 92, right?. Also I am pretty sure you can buy just the glass but not positive although I may be able to find a whole mirror assembly cheap if you get back on the color.

Its black.. found this also on ebay, this is what i need right?
http://cgi.ebay.com/ebaymotors/82-92-CAMARO-FIREBIRD-DRIVER-SIDE-DOOR-MIRROR-GLASS_W0QQcmdZViewItemQQcategoryZ33649QQitemZ79899 56231QQrdZ1

I can just pop that baby in right? Not the electric one, the assembly is fine, just the glass is fucked, i should get that right? Itll work for me?