Doing a search on the torrent page with just the word "internal" will yield a lot of results. You can read the titles/ descriptions and see if those are breeding/internal cumshots.
I especially like https://www.gaytor.rent/details.php?id=04f42b3c25d990813f627acd8bc2072f3c6dc60b9d40e208 as it has younger (age <30) guys. A lot of the TIM stuff has older/bear types.