I am happy to say that after 2 months, Dave and Linda @NWSL have produced an exact replacement wheel. Back in January, I sent Dave a GP-40 Wheel and Gear box w/Axle and he reproduced the wheel exactly. This wheel will fit an GP-40, Dash-9 and SD-45. My test wheels will be arriving next week. They are stainless steel or nickel silver and are around $6.00/ea. I will post more after I receive and test them. Now we can all throw away those nasty plating peeling wheels.
Joe