I've looked for more videos of them, but I only found one they appear with Nina Hartley.
(Click on the images to watch the videos)
# The Starr sisters pay a visit to Nina Hartley
Natasha Starr
# Natasha Starr and the bearded hunter.
# Natasha Starr. XXL.
Natalia Starr
# Natalia Starr with Holly Michaels.
# Natalia Starr. Daddy's GF.
# Natalia Starr, my sister's horny friend.
And this is their Twitter account, in case you wanna follow them...
# The Starr sisters' Twitter account.