Adding vibrator?

There's no vibrator in 12S right? or it's mine not working?

Wanted a vibrating alert for DEVO 12S. I can barely hear its buzzer at the field.
Is it possible?
I'm thinking of paralleling it with buzzer but I don't know if it can supply current for added load.

Hi, looking for this info I run into this post...
Do you finally get the way to make it?

Thanks!