Thank you for the reply. I will search on google and OpenGameArt!
Viewing post in Isometric Tiles - Town Pack comments
The main problem is really that the source images are already incredibly small, so the modified versions I have are all 128x128 and there are no larger texture sizes.. Some of the original images were a bit larger, but you can use all of them however you like since the Golgotha textures are all CC0 as well!