First of all, welcome to the community! 
Did you mean the lower thirds controlled by an Apple Numbers document? You can use mine. It’s in the style of Achim’s document.
The look of my document:
DOWNLOAD:
https://drive.google.com/file/d/1ywznF2Ad2LIwx6CzPxigE-coW0DHCc45/view?usp=drivesdk
HOW TO CONFIGURE IT?
- Add a lower thirds layer to your mimoLive document. You can skip this if you already got one.
- Click on the LT-Layer with the right mouse button (or on a particular variant)
- Copy API Endpoint to the clipboard
- Finally, paste it at the Numbers Document, where you see
/api/v1/… (next to “API-CODE”)
Now, you’re ready to go. 
All the best,
JoPhi
Ps: If you want to use this from another Mac, change “mimolive2:/” to http://<ip/hostname>:8989 Instead of ip/hostname use the ip or hostname of the computer in the network. If you use an API-Password-Key, add ?pwSHA256=<API-KEY> to your API-Endpoint.
Notice:
A call with http:// leads to new browser windows/tabs. “mimolive2:/” as a protocol is only at the same computer than your mimoLive document available.