There are many ways to find materials for AliExpress product posters. First, you can search for image materials of related products on the AliExpress platform, and you can choose high-quality images to download and use.

Second, you can search for materials of related products on other e-commerce platforms or image library websites, such as searching for high-definition image materials of related products on Getty Images, Shutterstock and other websites.

In addition, you can also take photos of the products yourself or make promotional posters for the products to ensure the originality and exclusivity of the materials. In short, you can find materials for AliExpress product posters through many ways. Choosing high-quality and original materials can enhance the promotional effect of the posters.