Wedding Planners are found in the nine original starter towns in their Arcanum buildings.
Books, Paper: Wedding Handbook
Clothing: Wedding Gown, Wedding Cyclas, Wedding Raiment (various colors, male and female)
Food: Bottle of Champagne
Gems: Invitation Wedding Hall, Invitation Plateau, Invitation Ithanc Cathedral
Weapons: Elegant Flower Bouquet, Simple Flower Bouquet
Cooking Items: Wedding Cake Figures, Wedding Cake Knife