Today I took the pan off my '69 RR just because the gasket was leaking. I found the oil to be clean and in good color but found small plastic white shavings at the bottom of the pan. The trans was not having any operational issues. Where are these shavings from and are they anything to be concerned about?

I bought one of the hard plastic gaskets with the small o-rings around the perimeter. However, no matter how hard I tried (with very careful pounding), I could not get the old stamped metal pan true and flat. I am sure it will leak again even with the new gasket. Anyone have a suggested source for a new straight pan?