I bought this one at microcenter. Its kinda expensive but I havent had any problems with it at all. Its really thin and fits right in my glove box. I think it was about 80-90 bucks.
Here is a pic of it in the glove box.
I think it was worth it.
Mine worked fine after standby for a while... I just rebuilt my PC this weekend and not its not working after standby. I dont know what gives.
I actually gave up on hibernating and standby, now I just reboot. There were too many issues.