Tally Light setup for Sony z150 videocam?

I am new to live stream broadcasting so I often learn the hard way about gaps in our workflow and gear.

I am interested in getting tally lights set up to keep our Pastor aware of which camera is hot. We have 3 Sony z150 videocams and are running Wirecast v8.2 on Windows. Our camera capture device is an AJA io4k. So the workflow looks like this:

3 Sony z150's-->SDI cables-->AJA io4k-->Thunderbolt 2 cable-->ASUS computer-->Wirecast v8.2

Does Blackmagic have a product that will work with my gear? Hopefully, something which will show both Preview and Program.

Thanks much!
Bill

Because you have nothing that is in any way running with BMD gear.. There is no way of tally integration at all.. BMD works it's tally over return video SDI.

Check with skaarhoj if they have a GPIO box that will connect to wirecast and run Tally.. Or ask at the Wirecast forum how to do tally..