Between the metal seat parts and the upholstery are these plastic wear protecters. Mine are pretty discolored and stained, so I cut new ones.
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I fretted for quite a while not knowing where to get a sheet of clear plastic material. After checking the local hardware and fabric stores, without success, I resigned myself to taking the 35 mile drive to the closest Tap Plastics store.
But, while procrastinating I had an epiphany. The clear protecter on my desk is almost exactly the same thickness and has the same flexibility. $10 at the Staples two miles away. They cut out easily with scissors.
My exhaust tips arrived yesterday. Time to adjust the rear valance holes and possibly add some sort of blister to accentuate the exhaust ports. Will see...