Any reason you guys wouldn't grab a DPDT switch, of appropriate current ratings
and convert a non-reversing motor to a reversable?
Just pick out the brush leads and run 'em to the center lugs of the switch
and the brush leads to the outer terminals.
You just swap sides with the brush leads on one side of the switch.
With that in mind, pick whichever motor you prefer.
Anyone still remember some of the universal (brush type) motors (usually a drill)
had a sliding brush carrier plate. You actually shifted the brushes to reverse rotation.
It moved them to align with the adjacent segment of the commutator, which shifted the magnetic field offset, thus switching the reaction and rotation.