Where To Find 10" Shoes
are you getting the same width shoe as the original?? I cant imagine what the shape of the hole has to do with the spring, holding the shoe in place,,,but im not there to view it,,, you can either check a local napa store??? look at rock auto.com
or drill the hole with a drill bit thats close to the size just to round the hole out and not make it too big that the spring wont grab a hold,,, just my 2 cents