You can find them at World Market, but like most of the food at World Market, it’s overpriced. Some Target and Walmart stores have Tim Tams, or at least the ones where I am in Northern California. There’s a Fijian grocery store near me that has a bunch of Aussie things too.

My wife and I usually just bring some back with us when we visit Australia. We’re both Australian so we try to go back every so often to see friends and family.