You can choose from below extension providers

• https://amasty.com/magento-store-locator.html
• http://www.magestore.com/magento-store-locator-extension.html
• https://ecommerce.aheadworks.com/magento-extensions/store-locator.html

They are providing demo you can double check with them before buying.

Hope it helps

You can choose from below mentioned Magento 2 store locator extension providers

• https://amasty.com/magento-store-locator.html
• http://www.magestore.com/magento-store-locator-extension.html
• https://ecommerce.aheadworks.com/magento-extensions/store-locator.html

They are providing demo you can double check with them before buying.

Hope it helps