I have just bought a 40 series driven 5/8th bore and driver with 1 inch bore which are both aftermarket and are not made by comet sadly sue to the fact GPS does not have them in stock at the moment or do not carry them anymore. I ordered two, six inch diameter floater wheels as well as two sets...
I am currently in the process of putting on a 420cc, 40 series torque converter, new jack shaft, breaks rear axle, shocks, and rims and tires for my Murray kilowatt.