Need to replace the Secondary Air Pump on my 2004 Crossfire. I've checked and changed out the RCM relay, checked fuses, checked solder joints, check valve, checked lines, etc. etc and haven't been able to permanently stop the check engine light (P0410) light from coming on.

Looks like prices are all over the map and was wondering if any Crossfire owners could provide some guidance on getting the best deal. I'm in Canada and have seen prices range from ~$1500 to $600 from local sources to ~$300 to $500 online (Amazon, ebay etc.) Thanks