I would recommend some brands and products to you. They are Cobra from classicshaving.com, Schick, Gem or Ever Ready injectors from ebay and other sites. I hope you will find your injector.
Neither Gem or Ever-Ready made injectors.
If you mean blades try Jean Coutu pharmacies, they sell Schick injector blades here in Ottawa.
He asked "single edge injectors" and I just answered his question with tiny but a wrong placed "injector" word instead of "single edge, injector". I am sorry for my not-native language imperfection.