It's not a question of affordability. It can't be - we drive vehicles worth $40,000 to $70,000!
It's about value. Two vinyl stickers for $100 if you don't want them to be reflective. You say you want them reflective? That's $125 to you, bubba.
Now look, I can go buy reflective 3M sheets for a small fraction of that, make my own template, cut out my own damn stickers, and have the did-it-myself feeling of accomplishment and having beat the system.
WHICH IS EXACTLY WHAT I'M GOING TO DO.
To do the surfaces to the outside of each headlight you need a piece 4" x 9" on each side. That'll cost all of $22.00 here:
https://www.identi-tape.com/super-eng4.html with PLENTY left over if you want to do the areas under the headlights.