Fixing side mirror--need help

Like an idiot I ran my drivers side mirror into a traffic barrel and the mirror fell off. The motor that moves the mirror around is intact and still works and there are two electrical wires with the prongs attached as well. I need to replace the glass and whatever it is that holds the glass in place and plugs into the electrical wires.

Can anyone tell me where I might be able to locate such a part? (It's a 2003 Impala LS)

Can anyone tell me how to replace said part, if I can locate it?

I'm NOT looking forward to going to the dealer to get it fixed.

In looking around the internet I'm finding places that sell the entire assembly but I don't need that.

TIA

this link takes you to rockauto.com ther price is $37-50 http://www.rockauto.com/catalog/x,carcode,1410433,parttype,1304