Deleted Map by accident.

Going through my uploaded assets cleaning them up, I accidentally deleted the background map of a dungeon Im using. I still have the dungeon page open and can see the map, knowing if I close it it will forever be gone off the layer. Is there a way to readd the map image to my assets from this view? I no longer have it locally to reupload. Anyone have any tips or clues how to save it off the roll20 page I still have open? would hate to start over with another map. I spent days doing the dynamic light outline, filling the map up with items and creatures :\

Yes, I did it stupidly while trying to delete the one next to it..haha I still have the page open that had the image on it and can see it still. But pretty sure if I close it and go back to it. it will be gone. its only cached on my side I presume. Cant figure out a way to save it off the page and reupload it to my Library. (or find it in my chrome cache files to save it off before closing)

I found a work around that works enough for me :). Move the map layer to token layer so it covers all the map objects, then move it 'to front' so its the only thing you can see (on top of everything else). Then zoom to 100% of its original size. Then screenshot and pan around then stitch screenshots in photoshop and trim to exact size of old image, and reupload. :D