Here what I found on redrivercatalog.com concerning their paper profiles for your Artisan 50:
"Color Profiles for the Epson 1400, R380, R280, R260, All RX series, Artisan 50
NOTE: These profiles are labeled for the Epson 1400, but will work for all the printers mentioned above using Clariaâ„¢ inks. "
It would seem that until you have a profiling solution of your own, you might try any of the Epson profiles (from the Epson site, if available) for the printers mentioned above. It seems pretty dicey, but maybe it's better than nada?
Tom