Where can I buy side blinders?

[u/CandyReady]

At least that’s what I think they are called. https://www.pillasport.ca/products/pilla-blinders
Pilla is out of stock but I was hoping that something like this would be easily available. Can’t find any in Canada. Is my search word so off? Can someone help please.

[u/warpFTL]

A DIY option: Go to staples, buy a binder and cut to the shape you desire.