hi, i've just looked at their (eicra) another script, i believe they are all the same, based on eicra cms written in zend framework, and all ioncube encoded.
so i would bet encoding is the same.
and having had a first glimpse, it looks like it might be decoded and nulled (there are whole lot of backlinks in the script, won't be possible to use it without nulling).
personally for me it would be interesting to check out their b2b script, if you happen to have it, drop me a line here, and i would try to sanitize it.
alternatively could be done as a paid assignment.