There is an agency which originated in Montral Canada called Cast-A-Way.
www.cast-a-way.com
They have now franchised to several countries around the world. This is helpful to have a "local" contact for ship jobs in other countries. The people involved have all worked on ships previously, so they will have some info of how things used to be, albeit not current personal experience obviously, because unlike me, they are no longer onboard ships. But as I said, they seem like stand up people. Find out who pays them - is it you???
I know a few people who have been hired through these guys. Like every agency they are not for everyone, so check it out for yourself! The principal owners name in Montreal is Eric, and he seems like a nice approachable guy.
His email is eric@cast-a-way.com - 1(514) 694-1194
Use the same professional approach - research the job you want and don't be afraid to pick up the phone and call!
