Epson 3880 Media Profiles
My 3800 did not have them and I think the 3880 came out before these papers also.
Just download from the Epson site.
Here is a little more info on the Epson profiles for the 3800 & I would expect the 3880 to be the same. They are very good but I do get slightly better results on most papers using my ColorMunki to create my own profiles.
I second the recommendation about creating your own profiles with the CM Photo or equivalent. The only time that I've found the paper company's profile to be superior to what I created was with Red River Metallic.