Digi-Key Electronics carries products by Omron Automation, however Z-15GQ-B7-K is a switch that we do not currently carry. Digi-Key does carry a few alternative options. The closest match being Z-15EQ-B.
For a list of available options see the following link. https://www.digikey.com/short/zwh15c
If there are any questions, please reply to this post and we will be happy to address them…