There is for the 05 Spectra, but not the spec5, our bezel is slightly different.
When I install my head unit, I am just going to ISO-mount it with the factory brackets, and fab a spacer for the slight gap of the radio trim to bezel. Or if it doesnt look too bad, do nothing.
The one thing I will buy when doing mine is a single DIN pocket, probably a toyota or nissan pocket to fill the bottom DIN sized hole.
Poke around the net for them, tey can be found for under $10.