I used Jessica Poko of Jessicas Design Shop to make my monograms - shes awesome! You can pick four of her monogram designs for $13 and then have her customize them to fit you - you can change the font, colors, etc to make it your own. You might check her out - tell her Nikki Gardner sent you
Link to her website: Jessica's Design Shop
From there you can click on monograms and link to her etsy shop or see more on her flicker site. She is doing my invitations as well Shes super responsive and great to work with.