x seats reserved in your honor - what sites did you use to order these cards?

I ordered mine off Shutterfly. I was able to edit it to say ____ of ____ attending. I hand wrote the number on each invitation. I'm sure you can edit with your wording also.

I bought mine from Zazzle. I don't remember if the template already included that phrase or if I edited it myself, but either way it was pretty simple.

Shutterfly has RSVP cards you can edit and customize to say what you want them to!