Yeah I buy the thc strips off ebay for about $1.25 each.
If you've got 2 weeks I would eat a high fiber diet with metamucil till about 3 days before the UA and then load up on fatty meats the folowing 3 days.
You'll probably be a good candidate for the dillution sticky. Don't load up on fluids prior to the UA.
I would still check into subbing though just incase you don't get clean. Always good to have a backup plan.