Thats what we did and everything went just fine.
He had done a mistake on the first copy and the week before my interview he filled up the form again from the website, printed it, had it notarized and sent it to me express. They never questionned it at the embassy....
and honestly, I have NEVER, EVER read anywhere on THEIR forms and instructions that it had to be THEIR sheet, and anyways all the other forms we ever submit for this process are printed from their website.... This is from the VJ instructions, and not doubting about anything, but there is so many things that have changed in the past year, like the electronic filling of the DS-156, etc that I would be really surprised that they would not let you print the form yourself.
Good luck!