These days a lot of people are printing their own invites. I love these wedding sets by e.m. papers, everything you need, all coordinated so you don't have to think to about it.
Don't need the whole set? You can purchase printable menus, escort cards, programs and invites separately. All you need to do is pick your design. Good luck with that ;)
Check out all the wedding printables by e.m. papers here.