There is an app for finding Squishmallows called "Squish Alert," which is not affiliated with the Squishmallow brand. This Squish Alert app was created by Jessica Dao to help plushie fans find stores with new shipments of Squishmallows. Squish Alert users choose from a list of stores to receive "alerts" when the major retailers stock up on Squishmallows. You can reach it at Squish Alert.