holes are the least of it. Make backer plates for both sides and seal/pack the old holes. You can often find winches of that size used and in good condition. In our area Wolfs Marine-Home
has winches I have seen. Nice people - call them. Our Marina, Torresens in Muskegon also hase good used winches. Unless they have been abused, they are nearly indestructable. Parts
- Lewmar Winch Schematics
You might also find that the self-tail parts
can be added to your winches although, that vintage may not be available.
Is it possible that a call to Lewmar may reveal that the hole ptterns are unchanged?