The B&M universal type floor shifter will work.
Have you done it? I though the detent-to-detent position was different on the TorqueFlites vs. the BWs? Plus I think PARK is a slightly bigger distance than say P to R or R to N.
I've had a B&M StarShifter for some time, and tried to match it up to my little aluminum case BW, manually measured the trans shift lever stroke at the pivot hole.
But I didn't write anything down, or actually put the cable on it and measure the linear stroke (as opposed to the arc the lever follows). I could be talk out my a**.