Third Party Decklid Spoiler = $80-100 but it's primed, unpainted.

Mud Guards sometimes pop up for $50 on ebay but they're painted already as they are a Genuine part but usually in a colour that doesn't sell well.

Modulo Grille - Hard to get this without ordering from Honda directly.

Second Hand Parts would be from a wrecker but it's hard to find a wrecker with a CU2, let alone with a Modulo kit :l