Here's a link to the mouse where you can purchase it: https://amzn.to/3UfJz4j
Here is how to swap the Left and Right mouse buttons on a Logitech M585 mouse.
First you will need to ensure you have Logi Options+ software installed on your computer.
Next Open Logi Options+ and select your mouse from the list of connected devices.
Finally click on the SETTINGS tab and under the GENERAL heading you will see the button for Swap Left / Right buttons.