I need someone(s) to point me somewhere.

What I need is the following...

1) A place to grab an envelope template for Illustrator. I can of course just make the document the proper size and everything, but I also need 2) for it to print properly and I'm wondering if there is anything that needs to be done in Illustrator that prepares it for printing on the right size...

Any information on this topic would be appreciated.

Thanks in advance,