From what I've seen on the internet and calling my local mazda dealer, you can get Mazda wiper for ~$60?
I just ordered Edge blade + wiper arm $36 at my local dealer. It sums up to the same amount if you get it off internet, since you have to pay for the shipping.
Also when I called mazda, they told me 3-5 days to get it.
Ford-only 2 days. Sometimes they can get it even faster, because Ford has warehouse in Sacramento whitch is like 2hrs from here.