If you have a Super Sailfish (most fiberglass versions) then yes. Check the length of your booms. If they are 13'-10" long than you can use a Sunfish sail. I have used and new, cjo1023 at yahoo-dot-com.
If you have an early wood or fiberglass Sailfish, the sail is 65 sq. ft. If you have a Super Sailfish, the sail area is 75 sq. ft.
The standard Sunfish sail is 75 sq. ft. and will work fine on the larger Sailfish. If not, Kevane Sailmakers makes a 65 sq. ft.
aftermarket sail that is designed for a Minifish.
Are you still looking for a Sailfish sail? I just acquired one this afternoon, red and white panels, no rips, repairs, one or two
tiny pin holes, nice, crisp Sailfish logo. Good aerodynamic shape. $65 + shipping. If interested, e-mail me at: firstname.lastname@example.org and I will e-mail you a photo or two.
If HSWell doesn't need the sail, Zsa Zsa does. She is the plan built Super Sailfish you saw, she only needs a keel and new plywood for the hull.....surprisingly she had all of the other parts except the sail was long gone.