By northeast you mean a place where you could drive and drop your skis of? I think there will be some shipping involved anyway. I believe I saw an add in Trax from a guy who now runs Nate Brown/s service, but they are in the northwest, if I am not mistaken.
there are numerous places that grind apline skis, but naturally the results for XC would not be guaranteed.
I am lucky to be in Moscow at the moment where I rop my skis off and pick them up after 2 days.