If it's a CV voicebank I can give you a hand with the OTO, but as far as getting the voicebank and having someone on-call for updates it's highly unlikely that you'll get someone for free unfortunately. In this case it's best if you grab a friend and have them come over to record...Or you could just say 'Hey wanna hang out?' and when they get there say 'Hey, you should try this!'
If you don't have any male friends then try to get a girl who you think could do a good imitation of a male voice. And just remember flags and effects in audacity can go a long way with making a female voice sound male...Other than that, it's like Stars said. dA is your best bet. The place to look for a HUB of that sort of stuff is utau-shop on deviantArt, but you will need to pay unless you get
seeeeriously lucky. Again, if it's a CV bank I don't mind doing it for you, but other than that if you
really can't do it yourself then grab a friend. Shouldn't take more than 15 minutes tops if you properly research how the making of a voicebank works. Just look at your friend hand them the microphone and tell them to 'say aaa' XD