I didn't pay attention to the colour of Red Cluster Pear until recently. I've been gradually eating them since I picked them all in early October, and maybe I've eaten all the really red ones.
However, one of the photos on Tatiana's site looks the same as what mine currently look like:
http://tatianastomatobase.com/wiki/Red_Cluster_Pear
Seeds are available from Quebec:
http://solanaseeds.netfirms.com/TomatoesM-R.html