Instructions
Avoid official retail outlets. Lisa Frank merchandise is still very popular, but if you are looking for vintage merchandise, you won't find it on the official website or in a big box retail store.
Search an online auction site. After searching for Lisa Frank, you can narrow down the results by category---key chains, lunchboxes and stuffed animals, for example.
Search on Etsy, an online marketplace for handmade and vintage goods. Next to the search field is a drop-down list from which you can select "Vintage." Use this to search for Lisa Frank, and the results will include only Lisa Frank vintage merchandise.
Visit thrift shops and secondhand stores. Lisa Frank's popularity among young girls means that oftentimes items are donated or sold while they are still in good condition. While high-end vintage shops may not carry the merchandise, shops that cater to a thrifty crowd may.