I need new hatch cover the rear of my Riot Stealth / Sun Flight, where can I purchase this?

I need new hatch cover the rear of my Riot Stealth / Sun Flight, where can I purchase this?

The  large neoprene hatch for the Riot Stealth / Sun Flight rear hatch is the one that fits the current Riot Polarity 16.5 Tandem rear hatch and the Dimensions approximately: 36x60cm

https://boutiqueborealdesign.com/collections/hatch-covers/products/neoprene-hatch-cover-large

Thanks

Kayak Distribution