Retro shades galore. Moon Shine Lamp and Shade is an online store based in Texas. You'll likely find whatever shade you desire here if you're going for a retro look.
Their shades are all made to order. You choose from a long list of basic styles and specify the size, color, and print. The look is retro atomic, so maybe not for everyone. You'll find they also offer lamp bases and accessories for hanging the shades or outfitting your lamp with unique bulbs.
We found that their prices are very reasonable for custom lampshades and their variety is virtually endless.