Digital BW, The Print

Hopefully someone can straighten me out here.  I bought some Epson 12x12"
scrapbook paper, and really like it.  It has a warm tone and seems to do
well with the 2200 and UC inks for b&w (actually toned somewhat).  It seems
to have somewhat more tonal range than the Arches Infinity I have been
using.  In perusing the archives, it appears that it is similar to Epson
Ultrasmooth Fine Art paper, if not the same thing, though the Ultrasmooth is
available in different weights.  Is that correct?  If so, does anyone have a
good source for online purchase, as it is not available at the Epson online
store.  Thanks!

Regards,

  --Ken Carney
    www.kencarney.com