Vinny, the wiper on my 54 looked exactly like the one you described, except the motor windings on my motor look a little funny now. The gears on mine were still good, but if you swapped the gears into your motor, i suspect it would only be short lived before your 6 volt motor burned up as well.

Let us know how the wiper from Roberts works out, if you go that way, or whatever you find that solves the problem. Gene