Bull -
I would just buy bulk, with enough coverage to do the headlights twice...you are sure to a least mess up one headlight if you haven`t worked with ppf at all
Got access to a steamer ? it should help when trying to get the curve of the headlights - depending on headlight style..
The film is thick....it might not correlate what I`m saying until you have it in your hands to understand how thick and pliable or not it is....
With headlights off the car, you can *pull-stretch* a smidge more - bad analogy but picture wrapping a mirror cover.
Then you also need to get all the fingers out, figure out the tension and also lay it down the edges
PPF is a acquired skill....DIY is doable .Will it look great, eh, depends how many times you end up redoing it...
Messing around with the adhesive has a finite window as well.
Not trying to talk you out of it, but this is what is involved.
I`m sure there are plenty of those pre cut sites available. The template/shape where it just covered the lense IMO is hideous.....
However, I come from the POV of things should be tucked
It wouldn`t hurt to visit a shop that offers PPF and inquire about the cost just to compare ...
IME, buying PPF on the retail level is $$.....this reference goes a few years back when I bought a small piece of bulk from Xpel to do my Snowblower...