Hi

That part is K0188 

We have it on our Canada store. https://boutiqueborealdesign.com/collections/mako-parts-accessories/products/plastic-square-bracket-kit-for-pedal-drive-riot-mako-air-8-5-versa?variant=

Please check back with us soon for where to buy this in the USA. 

Looking forward to getting this resolved for you!

 Kind regards,

Vibe Kayaks Support