Considering that to use Colorbase you need to have a spectrophotometer, I don't see much reason to want to use someone else's profiles on your Colorbase "calibrated" printer. If you own a supported spectro, most likely you will have profile creation software to go with it, so you could make your own profiles.
Colorbase is a great idea, but because it is "limited" to Epson papers it is a poor implementation. If it allowed you to set the ink limit and linearization for any paper, this would give you optimum performance on any paper. It would also possibly cut down on Epson's paper profits.