I know how you feel! I lost my mom 19 years ago and couldn't think about having a wedding day without her. That's why I'm eloping in jan 2013. In honor of my mother I am having her picture on her wedding day in a gold locket that she left me. I am having it put on my bouquet stem and will have it open for the whole day. Iam having a picture of my dad on his wedding day on the other side. I hope my suggestion helps!
Sending blessings your way!