* Stock illustration websites: These websites offer a variety of illustrations that you can download and use. Some popular stock illustration websites include Shutterstock, iStockphoto, and Adobe Stock.
* Illustration portfolios: Many illustrators have their own portfolios where they showcase their work. You can find illustration portfolios by searching online or through social media.
* Art galleries: Some art galleries feature illustrations alongside other works of art.
* Illustration books and magazines: Many books and magazines feature illustrations. You can find illustration books and magazines at libraries, bookstores, and online.
Once you have found a few illustrations that you like, you can save them to your computer or phone and use them in your work. You can also contact the illustrator to see if they are available for custom work.