I went the cheap route. I removed the grill assembly and bought a replacement rear bowtie from my GM store (about $30) to stick on there and used lots of glue. Grabbed some RustOleum metallic spray paint and lots of masking tape and went to town. Thought it turned out fairly well.

[attachment=2:3bz88wyo]aveobadge2.jpg[/attachment:3bz88wyo]
[attachment=0:3bz88wyo]aveobadge3.jpg[/attachment:3bz88wyo]
[attachment=1:3bz88wyo]aveobadge1.jpg[/attachment:3bz88wyo]

Sorry about the pic quality. I took them from my phone.