From what I have been reading (for like two weeks now) the Quick fix 4.0 is the best answer. It's Synth pee and is 100% undetectable. I even read from a medical/government site that has a real problem with this item and is going to start using other methods due to the success rate of it. It's made from Spectrum Labs and is easily found on places like EBay or a simple search. Myself I don't want to leave anything to chance so this is the one for me. I do my test on Monday and will let you know the outcome. I will get the results right away so I will post ASAP.
While this is just a suggestion here you should do the research yourself to make it right to you on what you want to do. One thing is don't carry it in your pocket. Put it somewhere concealed and make sure to follow the instructions to a T. It has to be shaken before you heat it and right before the test. And make sure it is the right temp via the instructions. Any deveation could call for a re-test or failure.
I hope the best for you and good luck. And yes to fail an employment test would be tragic indeed.
Take care!!