Good (and cheaper) alternative to Vortex Generator?

Vorblade Vortex Generator MPG Test

Are Piper Vortex Generators Worth It? The consensus seems to be yes

Whirly bits—and why they matter

Various Shapes of Vortex Generators.

Influence of sub boundary layer vortex generator height and attack angle on cross-flows in the hub region of compressors - ScienceDirect

Energies, Free Full-Text

Blox Racing® BXPP-26010-4 - Custom Style Racing Vortex Generator Fins with Shark Fin Style (Unpainted)

Greg Stough on LinkedIn: Well done Belco and IFC.

Good vibrations: bladeless turbines could bring wind power to your home, Renewable energy

Good (and cheaper) alternative to Vortex Generator? Toyota GR86 Forum - GT86 Forum, Subaru BRZ Forum, Scion