Not sure if it will work for you to switch NLE’s, but the Avid 6.5 and up have J2K as a standard codec option .
Of course, Avid does not create Quicktime Media for editing, but rather wraps everything as MXF. But you can capture or import as J2K and export Quicktime same-as-source.
This might become an overly complex solution, but it might be worth exploring.