Agent X or Magnum Synthetic??

Well going for my first test UA test ever tomorrow and scared. I applied for a job I didnt think I would get but they called and would be awesome to have. Just no time to get clean before the test tomorrow. It is at a place called Midwest toxicology. Dont know if it is better or more strict than others out there as I have no knowledge on anything. BUt there are 2 head shops around me that carry either X or Magnum and wondered which might be better for substitution since only road I guess I can take at this point. Any thing that can ease my mind would be great. It's just for pre-employment so do I need to realluy worry that the fake stuff wont work as long as temp is good??

Thanks for your help and I will continue to research this site.

Well I went to the head shop and they had Quick Fix Plus. Here is my story and crossing fingers it worked...

So I buy it and I use 2 hand warmers I had at home plus the one that came with it. Within 45 min it is up to 96 degrees. I go into the testing site. Nervous as hell btw. I go into a room that has a separate room with a toilet and door. I forgot to switch the 3oz lid with the squeeze one provided. I get a lil paranoid about dumping it in the test cup so I tell them that I cant go and need to drink some water to buy some more time. They mark me down as shy bladder give me some water an I sit out in the waiting room for about 30 min. It didn't help with the nerves much but finally I just decided to go for it. I go back into the room and the 3oz is just enough to fill to estimated line she told me to fill to. I take it out and she splits the sample, I sign some papers and I am on my way. Everything went about as planned minus me being more scared than I thought I would be.
As I am walking out into the parking lot I feel something fall from my crotch area and down the leg of my jean. I try to walk slow but it falls out onto the ground. It was the hand warmer...wow...glad it didnt fall out in the facility:(

So now just the waiting game. Hope it works. Fingers crossed!

Just wanted to update: Quickfix worked for me too! Started on moday and worked all week :) Great job so thanks for everone who posts and makes this site so informative!