Try amazon.com and about 20 bucks.
Sorry that's all I know.
I am looking for some way to answer a phone (Standard analog line), deliver a message and disconnect within 12 seconds. I am willing to use an external device or software through a fax/voice modem. The most important part is the disconnecting within 12 seconds. I get billed if the call lasts longer than 12 seconds. I am not interested in taking any messages on this line. It is simply a way to divert one number to another. Call forwarding holds the incoming line open so I will get billed as does simultaneous ringing.
Answer - 10 second message - disconnect. Can it be done?