As for the spoiler, you can get one on Ebay brand new, "OEM styled" (which is in theory the exact same thing). for less than half of the price that website would charge you.
I have the OEM styled spoiler that I ordered from ebay that came painted and with all the accessory parts for $130.
Now for the kit, the only practical way you can get it is if you find a camry with that kit, copy down its vin number, and bring it to Toyota, where they can order you a "Replacement Set". And that would be quite expensive.
I chose to go with the JP Vizage kit. Check it out, and good luck with your camry