There are lots of places online where you can order paper.
Try this:
APrettyPaperPlace.com
ColorsByDesign.com
TheInvitationShoppe.com
TheInvitationShop.com
Or try a local craft store in their scrapbooking section.
Good luck!!
I'd love to hear more about your event!! We are trying to come up with some new ideas for our group.
ZL,
Allison