I know for a fact that the other party will deny your service. He has denied a potential ranochigo escrow service, solely because he did not have an active enough ANN thread. I do not think he will accept your service, sorry.
AFAIK most escrow providers around here might not have an active ANN thread but it doesn't mean they can't be trusted. If I were someone looking for an escrow, I don't post in the thread but rather contact them directy for a faster response.
Why not tell that other party that ANN doesn't really matter.
I don't know if Zzarb
https://bitcointalk.org/index.php?action=profile;u=369212 is offering escrow, he is a hero member but have a solid green trust. He don't have an escrow thread afaik but he has a lending thread and a currency exchange thread.
Zzarb is offering free escrow. Check his lending thread merged with his escrow thread:
https://bitcointalk.org/index.php?topic=1161170.0