I have an air bed with valves like those you've linked on Amazon. They are similar looking to the Zodiac one but very cheaply made and nor exactly the same dimensions.
The spares you need are easily available here... really no Zodiac dealers or other genuine spares suppliers in Canada??
They are very simple valves and rarely give problems... well they haven't for me and on my current SIB they are on the high pressure floor sealing really well.
I assume you mean this valve type...
https://seamarknunn.com/acatalog/zod...SABEgKHX_D_BwE