I haven't, but there is a fair amount of pretty neat stuff still available around the 'net from the 1980s. My favorite Chipmunks merchandise is an Alvin plush that has a pull string on the back; he has I think 6 or so sayings that he spiels through. It came out in 1983; my parents bought it for me as a baby, and I still have it. It's actually pretty neat and you can fairly easily find them for a decent price.