Maybe one of these similar products would be of interest:-

For KYT TT COURSE TTC Motorcycle Helmet Rear Trim Helmet Spoiler Deflector Cover

For AGV K1 K 1 Motorcycle Rear Air Trim Helmet Tail Spoiler Helmet Accessories

For K6 K 6 Motorcycle Rear Air Trim Helmet Tail Spoiler Helmet Accessories

Motorcycle Helmet Spoiler For HJC RPHA12 Wind Diffuser Rear Trim Helmet Deflecto

Motorcycle Rear Trim Helmet Spoiler For HJC RPHA 11 Tail Helmet Spoiler Accesori