Hi,
I am an ex vtiger team member with 3+ years experience on the team and 3+ years working as freelance consultant.
I have handled SMSNotifier with vtiger in the past and can do it for you. I would need SSH or FTP access to the vtiger setup and one admin user access to start.
If you want, you can contact me over on skype to discuss details. My skype handle is vtmodules.
Let me know your thoughts.
thanks