I know that spending money sucks, but....
I just purchased a student copy (full working version) of Vray for Maya for $149
if you go to Chaosgroups website they have a list of authorized resellers, I went with these guys:
They just needed to see a student id, which I have - if you have a teacher or student in your family grab their id
$150 is not bad for a legitimate dongle for vray and everything.
also this is NOT an ad, I'd like to pirate it for free as much as the next guy but sometimes you gotta do what you gotta do