CID Finder (https://cidfinder.com/) allows you to get the CID numbers using the Google Maps business page URL.
Here is how to do it.
1. Go to Google Maps. Find your listing and copy the URL.
2. Go to the CID Finder (https://cidfinder.com/). Then paste the URL you have copied and press Get CID.
3. Once you get the CID numbers, highlight and copy the CID that will be used to create a new tour or import a tour using GoThru.