Institute of Astronomy, Madingley Road, Cambridge. CB3 0HA. UK
Here you can download the Xspec 11 model associated with Sanders & Fabian (2006) for fitting X-ray spectra from clusters of galaxies, taking account of resonance scattering, absorption and projection. The paper this code is based on can be found as astro-ph/0604575.
The latest version of the model can account for absorption.