http://www.shapeways.com/designer/meliimako

Contact for custom orders: We can make anything up to 20 cm with vast range of materials (plastic, precious metals, ceramic, steel, iron, vax). A lot of orders can be personalized with personal text or image engraved. Price may vary depending on the complexity and material used. As a ballpark; a molecule similar to the image below in plastic would cost between €20-30, the same item may go up to 200 with precious metals (such as gold)