Every Princess needs a Tiara and I've featured a sterling silver art-deco style, handmade with white topaz ,from Castens, a shop specializing in fairy tale jewelry. It's not currently for sale but when it was the cost was around $600 & I'm sure they would do custom work at your request.
To complete the look there's nothing better than simple pearl jewelry. The 'Freshwater Pearl Necklace with Vintage Art Deco Clasp' from Tiffany Tassano Artisan Jewelry retails for $500 & the Pearl Drop Earrings sell on Amazon for around $200.
All together this bridal set would cost around $5,000, however the pearl jewelry & tiara could easily become family heirlooms to be used on multiple occasions.