Well the F16's are a mild development class and these T-foils are continuously being refined by John Pierce and his company Stealth Marine (www.stealthmarine.co.uk).

You may also be able to get T-foil rudders of another builder related to the F16's. Darryl Barret and his son have a boat building company, did the F14 boat and I believe work together with Marcus Towell (www.formulacatamarans.com) on the Aussie Blade F16's.

You could try either one.

Wouter