Yes, that is the correct website. You should be able to get the fingerprints done at any police station, or inquire from your local constabulary where it can be done. When you get the prints and the bank draft, make a copy of the bank draft and make a copy of the airwaybill from the courier you use to send the form to the FBI (don't send them your copy, you will need it to track the package).
I don't recommend you use regular post, you are working with a very tight deadline! Use FedEx or DHL or whoever serves your country as an international courier. Send the copy of the draft and the copy of the airwaybill back to your embassy with a cover letter explaining that you have sent it off, and tell them how much time the FBI estimates to take. That should be enough to buy you time to get it back and submit it.
If you can, I also recommend you get a prepaid envelope from the courier for the FBI to return it to you. Explain on your application form in the part where they have "Reasons for request" that you need it for immigration to Canada, you have a deadline of (insert date) and ask them to please return it in the prepaid envelope. I have heard of them expediting requests from people.
