A real tightwad would rub down metal plate with sandpaper and Araldite any suitably shaped piece of hard rubber on to it.A close friend has assured me that it remains in place even after 3 years.The bolt holding that plate on is hard to get at and a bugger to remove.
Try Paul at Coastal Rides on 01797 367333. Has a good stock of second hand VP drives and may have what your after. Very Helpful whenever I have spoken withhim.