Rigrite: Lost cause.
Halsey H: yup that was the next possible step.
Otherwise: I going to take the mast trimmings and glue it to a piece of pipe. Then run it thru the partners down to the foot and take measurements, then have the new foot milled out of 1-1/4" aluminum block or 3/4" stainless.
I would still like a pic of a good keel stepped foot in place as a reference.
1973 Bristol 34