I just got an email from Stamper's Ink (home of Riley and Co)...they have now closed their huge retail store.
But they also bought Prickley Pear which brings their owned lines to 6:
Riley and Co
Inspirations
Funny Bones
Cornish Heritage Farms
Thomas Kinkade
Prickley Pear
They have launched a new blog site called The Ink Spot where you can link to buy those lines but also will have tutorials (like how to color a Kinkade)
rileyandco
They are saying Prickley Pear will be available again this January.