Numrich ships to Canadaicon
https://www.gunpartscorp.com/international-orders
They have reproduction bolts and nuts.
Looks like they have in stock right now repro nuts and original bolts...threads don't match (original 10x24, repro 10x32). They will get more. They likely used up their stock to pair with the new shipment of c-stocks they got a month or so ago.
https://www.gunpartscorp.com/products/523250
https://www.gunpartscorp.com/products/1366820