You might try facebook. Nearly everyone is on it. Once you connect with your cousin, you can ask him directly for his number.
Yes, I did that, no help.
I did make contact with a relative and my cousin called me, so it's all taken care of.
Re: Facebook, I've been a little active lately trying to find friends from 40 years ago.
In the process I found an old message saying, "I have a genealogy project and I need your help."
I made this contact and he sent me a file of ancestors on my mom's side back to 1755!
I'm compiling additional information for his project. It's pretty cool.
btw, I was trying to locate my cousin to add his side to the genealogy project.
His son has already been working on his own, so there's a head start.