SevenCubed - 5:14 pm on Sep 9, 2012 (gmt 0) [edited by: SevenCubed at 5:43 pm (utc) on Sep 9, 2012]
In the few instances where I went that route I just asked my client to give them a heads-up that I would be contacting them. For me that warmed the potential link source up that I would be a "friendly nuisance" sanctioned by my client who potentially had a better rapport with them but didn't understand the technicalities about the process.
<edit>reason: got my Frenglish mixed up and changed a word -- thanks Leo :)</edit>
[edited by: SevenCubed at 5:43 pm (utc) on Sep 9, 2012]