Before I get to your questions, let me admonish you that in the future, it would be appreciated that you start your own thread on your topic and refrain from highjacking other members threads.

Now on to the questions...
Is it easy for a company like Quest to identify and report synthetics?
I tried searching the forums and couldn't find anything.
Try different keywords. Search using the terms "non-human sample determined"

My roommate used to smoke as heavily as I, but quit 3 months ago, plus is very active. I know I could get him to give me some urine (we've been buddies for 15 years), so would it be more advantageous for me to ask him to provide my sample?
If you have access to persons urine sample that is known to be drug-free, then by all means use it.

I know my own urine won't be clean by that time, so I am buying a whizzinator online tonight (or tomorrow) to help me sub. The company we go through is Quest Diagnostics, so I know I won't be observed....but better safe than sorry.
Employment-related U/As are unobserved unless the donor had been suspected of tampering. Therefore, any artificial delivery systems are not necessary.

Even if there was cause for an observed collection, the observer, in adherence to protocols outlined by the DHHS, is to be inside the bathroom with the donor and directly watch the flow of urine exit the donors body and into the sample cup. There, any artificial delivery systems would easily be noticed by the observer, who would inform the collector. The collector, in adherence to the same protocols, would then stop the collection process and declare a "refusal to test".