Need help with invitations

My mother is having an extension put on her house because my grandmother needs to move in with her and needs a handicapped accessible bathroom, etc.

Anyway, my mom thought it would be fun to have a 'ribbon cutting' ceremony for the family to welcome my grandmother to the house. I'm looking for a cute paper to use for the invitations, but couldn't find anything on paperdirect.com or ideaart.com with houses on it. Any other sites I should check out?

TIA!