I actually just found some in the $30 range. Some require wiring into the turn signal wire, some are just a relay that replaces the existing relay (a 10 second job). I'm sure an Asian distributor has something under $10, but I've lost interest.
I prefer to just hold the lever in the not fully engaged position until I'm satisfied. Our Mazda has the one touch triple blink and half of the time I use it, I end up fully engaging the turn lever anyway, so it's not really very convenient. I also don't think 3 blinks is adequate. I'd prefer 4-6.