When shopping for outdoor furniture cushions, you can usually find them wherever outdoor furniture is sold. You can try home and garden stores, which are great places to find not only outdoor furniture cushions but also anything else you might like to place on your patio or yard. Just make sure that you don't go with the first deal you're offered. It's best to shop around for the best deals. Your best bet is to go to as many home and garden stores that you can find and compare the prices. You'll get a good idea of the going rate for a set of outdoor furniture cushions but you'll also be able to choose from the many styles available.