first try with google "airfoil data x-wing" produces:

http://www.fluent.com/solutions/articles/ja153.pdf

for what it's worth

and this patent:

http://www.freepatentsonline.com/5405104.html

I didn't pull-up the entire patent so I don't know if it includes the data.

nothing that I could find here: http://www.ae.uiuc.edu/m-selig/ads/coord_database.html

but the link is included because it is such a valuable database for the designer

By the way, a round airfoil will generate lift if you spin it. Of course, you would have to be able to instanly reverse the spin.