Are you sure you need coils? I’m thinking it has the old orange Wico coils, which are nearly indestructible. Water pump?? Again, I’m not sure but it might have the old sliding vane impeller. You gotta make those yourself. But if it has the rubber vaned impeller, try clubmember Brian Wilcox, who makes aftermarket impellers. Finally, martinoutboards.com has aftermarket Tillotson MD carburetor parts.
All this is on speculation of what’s in there. Worth every penny. Which is nothing.