Yeah, like tben said, I'm only aware of them doing Rugby's tailored pieces. If they did ever do blue label, they *might* have done some of the RL Black Label stuff or possibly blue label RL Signature stuff (the precursor to purple label), but that's just a guess; I've never actually seen a RL signature piece.
Caruso makes for RLBL. St. Andrews, Caruso, and Cantarelli make for RLPL. I don't think Corneliani has ever made for RLPL. They've only made for PRL.