My WRX and 8th Gen Si had metal pedals with rubber "dots" in them, and they worked pretty well. I wouldn't mind a set like that but it seems like the only really good option is the one from the dealer that you can't get here.
I'm going to see about calling a Canadian Mazda dealer and trying to order a set.
Interestingly enough, I used the grip tape solution on my RX7 years ago and it's held up remarkably well.