Could foils (and our wallets) benefit from gurney flaps?

As the costs of front wings are spiraling I wonder if a cheaper solution like a Gurney flap could make sense to alter the lift-drag coefficient of a foil front wing. For example a HA wing, with a gurney flap (if somehow could be attached) c/would in theory become more lifty to make it more suitable for the conditions at hand, while maintaining other parameters like wing span, curvature etc.

There must be some way to apply this concept with foils... Thoughts?

Edit: here is a good explainer of the g-flap: www.formula1-dictionary.net/gurney_flap.html

I thought that droop slats would have worked okay. Fully extended leading edge device when still. As pressure builds they retract. Like a Fieseler Storch. But I decided there's no way to keep beach grit out of any mechanism.