You might be interested to try EvoluteTools T.MAP for Rhino for re-topology tasks, which is currently in public beta stage. Our current version already includes quad mesh output, this blog article gives an overview.
We are currently working on improvements for EvoluteTools T.MAP, but using the current version you should already be able to get quad meshes useful as a starting point for T-splines reconstruction. Please post questions and feedback regarding T.MAP in this thread: Release of EvoluteTools T.MAP *beta*
This webinar might also be interesting, among other things it shows how T-Splines and EvoluteTools Lite/PRO can be used in a combined way to fit a T-Spline to reference geometry: https://youtu.be/0e2_NMU_HL4