If the Knicks are ready to move on from Lee and THjr, then I trust they're hearing some good things about free agency. Kanter would be really hard to move, and honestly, considering he's an expiring, moving him shouldn't be a priority ( as cold as that sounds).
Best bet to move Tim and/or Courtney Lee would be with either the Kings or the Mavericks.
Tim, Mudiay and a second for Matthews/DSjr makes a lot of sense for both teams and seems realistic (From the perspective of both teams I'd make the deal).
Courtney Lee for Iman Shumpert works, and Tim for any two of Koufos/Randolph/Shumpert works too I think ( could even propose Tim and Lee for all three of them), with some sort of small asset coming back in return.
I could see the Knicks getting involved with Detroit and Orlando too, with trades centering around Terrence Ross and Ish Smith.
Moving Tim and Lee without taking on extra salary is gonna be hard, and it'll be even harder if the Knicks don't want to give up assets.