1. Getty Images: Getty Images is a reputable photo agency that houses an extensive collection of photographs, including many of Peter Allen and Elton John. You can search their website using keywords such as "Peter Allen and Elton John," "Peter Allen with Elton John," or "Elton John and Peter Allen."
2. Pinterest: Pinterest is a social media platform that allows users to share and discover visual content. By searching for "Peter Allen and Elton John" or similar keywords, you can find numerous photos of the two musicians together.
3. Google Images: Google Images is another excellent resource for finding photographs. Typing in "Peter Allen and Elton John" or related keywords should yield a vast selection of images depicting the friendship between the two artists.
Remember to use caution when accessing content from the internet, especially if you plan to use the photos for commercial purposes. Proper authorization and licensing may be required, so it's always best to verify the copyright status of the photographs before using them.