Finding WP Sites Which Use Specific Template?

I'm looking for wordpress websites which have been created by a specific template. I assume I would use a search engine to find this but so far, I haven't had much luck. I know Google can identify their footprint but I can't figure out how to do it.

Each template uses the same phrases and I've tried looking by phrases. I've tried looking up by the developer of the template Ex: "XYZ Web Design". (with and without quotes)

The reason I'm searching for them is because they are in my specific market and I'd like to invite them to a webinar, we're conducting for this market niche.

Thanks in advance for any help.

View the page source, there will be clues (read footprints) that you can search for.

Send me a pm if you need help.