If you're in the New York City area and looking for invitations, stop by Kate's Paperie for Bridal Brunch, a workshop on custom printed invitations. The fee is $10 but you get a $10 gift card and a discount if you order custom printed invitations.
If custom made invites aren't in the budget, consider getting pre-printed invites. I've picked a few of my favourites from Kate's Paperie below.
By Peculiar Press
So cute for a graduation party!