Display Issue on List Pages

Good morning All,
We have approximately 350 shops which we want to display on a summary page on Google Maps across a broad geographical area.
We have no issues generating the shops on the Google maps however the display on the actual map is limited to the number of shops on each "list page".
So we have 20 records (by default) on each page.
We don't want to change the pagination to have all 350 on the one "list" page however we do require the entire 350 records to appear at once on the map, while retaining the current pagination display.
Any assistance would be appreciated.
Thank you.