IN9004 Invision module

[Handball317]

Does anyone know where I can get one of these modules (for a decent price)? I have the gm accessory dual headrests but this system doesn't have any inputs. I need this module so my OGM1 can output to the rear headrests. I guess Invision is owned by Audiovox. You would think wouldn't hard to find a dealer for this (but it is here in Edmonton). One dealer here will get it for me but the price seems way out to lunch. I don't care where I get it as long it's not outrageously priced like around here.