Other than that, you can find hundreds of maps for other RPGs online - I’m sure there are some random map makers that will do floor plans. They won’t be as setting specific for Blades though.
Check out watabou’s various RPG map generators, too: https://watabou.itch.io/ They’re not specifically for Blades, but you can strip away some of the medieval fantasy trappings. I’ve used the dungeon generator to makes banks and administrative buildings for Doskvol.