gmpartsdirect.com. Got one for $80.00 back in September. Sorry, don't have the part number handy.
2009 G8 GT- Sport/Premium, White Hot, no roof (no, it's not a convertable), Cortex 93, Roto-Fab CAI and rad cover, BMR STB, SFC's & trans brace, C/F GXP diffuser, VG Sharkfin, DBA drilled/slotted rotors & Hawk ceramics, MagnaFlow axle backs, Glock 23.
1979 Z-28 10.5" project- still under construction
1998 Silverado 3500
2007 Acura TL Type S (the wife's)
2002 Camaro SS- sold