Are there legit products to help you p a hair follicle drug test?

I have permanently quit smoking cigaweed but it has only been about 2 1/2 weeks. I am looking for a job and I know the drug testing will probably be inevitable. I am pretty confident on how to p a urine test (lots & lots of water, cranberry juice, a little vinegar, and exercise) but don't have any idea if the company does the hair test. I don't even know if you can make yourself p it. Also, in case needed, I am 5'7" and 190 lbs. (yes I know there is more to love but we don't need to talk about that :) Thank you for any help.