Here are some of the customizable templates in Canva that you can use! Alex mentions this in the video.
Newsletter: https://www.canva.com/design/DAEcTa94ZzQ/714yRnbqG7PbcbyIcNB-8Q/view?utm_content=DAEcTa94ZzQ&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton&mode=preview
Expired Letter: https://www.canva.com/design/DAEcTVMDUqA/hicuGxcDq6JVNKJhbBQ5qg/view?utm_content=DAEcTVMDUqA&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton&mode=preview
Neighbor Postcard: https://www.canva.com/design/DAEcTU3gBGQ/7-XCBSfJDJMhvblz4KiYpg/view?utm_content=DAEcTU3gBGQ&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton&mode=preview
15 Prospecting Letters: https://www.canva.com/design/DAEXpSsJfic/tn5Sbw2u5ogClV4PVRZQzQ/view?utm_content=DAEXpSsJfic&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton&mode=preview