I have come across several websites with beautiful monograms. Check out TBB Designs and Pink Design Events for monograms, save the dates, invitations, party signs, stationary and so much more. You can purchase the monograms and you can use them however you would like. These designers have great prices and a variety of stock examples.
Monograms are unique gift ideas for weddings, bridal showers, baby showers, baby christenings, housewarming, etc.