If triple blink is what you're after, you may want to consider getting a bluebus bluetooth module instead. Aside from providing bluetooth connectivity to your car (and integrating the steering wheel controls, head unit display, etc) it also allows you to change a few vehicle parameters such as the number of turn signal blinks. I set it to 3 initially, and then changed it to 5. I think you can go all the way up to 8 blinks. The changes are made using the buttons on your business CD head unit, and it's also compatible with the factory nav head unit.
https://www.bluebus.dev/
No affiliation, it's just an awesome product.