Most professional models host their latest work on Instagram. While you can't "download" them as high-res files for design work without permission, it is the best place to view their current book.
Look for verified badges to ensure you are viewing the official gallery. 3. Model Management & Pixabay
Flickr allows you to filter by "Creative Commons" licenses. This is a great way to find runway or event photos of specific models that are free to use with attribution.