Hey there @Asian_Pacific_Oakmon 
Yeah, we have such a product and I see that you’ve already found it - it’s a Number Counter app!
With the External URL option, you’ll be able to automatically fetch data from the certain source:
We have a brief guide, describing how you can do this. Feel free to check it out - Number Counter: How to show dynamic real-time values in your widget
However, setting up the External URL requires specific technical knowledge. So, if you face any difficulties, please share a link to your source (a link to the page which provide the widget with the info about the number of available tickets) and our devs will gladly assist 