Just Google "Page 3 girls" - there are hundreds of websites full of photos.
The Sun has not feature under 18 page 3 girls since 2003.
They no longer put the newspaper online. You have to pay a subscription and even then they don't show the Page 3 pictures.
As the law stands today, if the subject is under 18 they are considered a child. Owning, distributing or making such an image ('making' includes downloading), no matter what your age, is a serious criminal offence.
To add to Tavy's answer, the models are all over 18 today also
