Hi Lowell, I may have a source for you. I sent them an e-mail to inquire if the item they have is indeed the correct item. If it is correct, it costs $65. I will let you know when I hear from them and give you contact information if it is the correct item. Howard #3 ----- Original Message ----- From: "Lowell Miller" <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, January 07, 2014 1:14 PM Subject: CORRECTION! CORRECTION! > The unit I need for the TH22.AT is TSU8! > I'm sorry I reversed the two letters when I typed them! > Thank you! > Lowell W8QIY