All in one invitations?

Hello all! I've designed my own invitations but nowwwww I'm running into the issue of I can't find anywhere at all to get them printed as an all in one invite. It's a invitation that is it's own rsvp card that has perforation and its own envelope. I'm wondering now if I should scrap the whole design and use a pre-made one from Ann's Bridal Bargains...if anyone has any ideas of where I could get them printed (I'm on a budget and from Portland OR where the average invite order is $1000+) I've looked at shutterfly, zazzle, etc. I've tried office depot but once you mention wedding invites they want you to talk to their printing specialist who never seems to be available...please help haha