That's what John answer to me:

Hi David,
We do frontal partials all the time. It is a narrow piece that goes from temple to temple and brings your hair line forward and fills in the temples. Attached is a example of what the template would look like--of course you need to customize it to fit you. I suggest Super Fine Swiss lace---it is undetectable and an excellent choice. We look forward to helping you.
Regards,
John

So I guess he suggesst me the TL100 Super Fine Swiss. But how can I order the right curl option? What do you guys suggest me about that? I think it might be the slight wave, but again, when my hair are short, there's no curl at all... And I know I'll keep my hair short, so I might forget about the curl option? And about the color, I send them a current hair piece and they're going to copy the exact same color? And what density you guys think I sould take? I think I might be at like 60% rang, but again, it's my first time so I'm not sure at all.