Google with "Authorized" in search string showed a promising 3rd result. Can't vouch for them, but they have a BBB logo on the website. I would verify, if they check out, it's at least a step in the right direction.....
The front glass can be replaced, and because it is not cemented to the display, the Atrix should be cheaper to get repaired than most smart phones.
Good luck, and please, do report your experience and where you got it repaired when it is done. I'm not planning on dropping mine, but Murphy tends to like me...