Latest update:
Thanks to user Nookz, the solution is finally here (no resistors needed!):
SUGERYY Amber Yellow 7440 7441 2590 Lumens 3030 Chipset LED Bulbs for blinker light
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I have received them and I have installed them and.. WOW!.. what a difference it makes!! I used four bulbs: two at the front and the other two at the rear (my car has European specs). THEY ARE SIMPLY PERFECT!!
Thanks again for sharing, Nookz!!
See you!,
Eos