Thanks everyone.
The actual price in Toronto, Canada is CA$275 which includes 15% tax. The fob is around $195 and the metal insert is around $40.
However I am sitting in (just outside) Tokyo, Japan and it seems that here every part is about 30% - 50% more expensive than in Canada. The markup is unreal. Unfortunately, as far as I know, Fastlane doesn't ship outside of the US.

A short list: spark plugs: 2,730 yen = US$23.45 I need 12
air filter : 6,130 yen = US$52.66
fuel filter : 20,000 yen = US$171.87
coolant : 2,300 yen = US$19.76 per liter I think

Car is a 2000 E320.
The dealer quoted me 26,500 yen for the fob and 5,700 for the metal key.
Tax is only 5%, what a joy. I may have to bite the bullet.

Alex