Manual Side Mirror Replacement

Does anyone know if it is possible to replace the "guts" on a manual side mirror in a '92 Camaro RS? I see that there are replacement mirrors available, but all of them are primed and need painting. I recently picked up a great used Camaro with a fairly new paint job. The passenger side mirror casing is in perfect shape, but has no mirror. Can I replace whatever goes in the casing without replacing the mirror itself and having to get an after market replacement mirror color matched and painted?

Thanks

im pretty sure you can replace the guts

Just the glass is missing or the whole plate and pivot?