For what it's worth, here's mine. I would suggest you do two things. First, rather than use TER's PM system to notify your previous clients, use email. You didn't say how many clients are involved, so keeping it off this site is, IMHO, a better idea. Second, it was suggested you post an ad on your regional board, I agree. You should also file a problem report and have your TER profile updated, if you have not already done so.
As a client, I would prefer to get an email from you in lieu of a PM thru TER. The PM system is not intended for personal solicitation of business, which is essentially what you would be doing by sending PM's to clients updating your availability information.
Swim