These are very nice but there is one drawback: in most US states if the other driver can’t see your intentions as you’re driving [bc he/she can’t see YOU] they’re illegal to use.
Mr2lo4cali just type in "luxury curtain" under eBay Motors / Parts and Accessories you'll find LOTS! Ranging between $25 - $300, they're Garson (which is the most expensive around $2000 - $300) than, D.A.D. (another expensive one around $99) Junction Produce is about $45 - $60 and than you can get Universal one's with no badge on the curtain which are about $25.