For games set in a more modern London or other major city, here are paper models of the Rose Hotel and a Chinese Restaurant.
Here’s a nice paper model of an old west sheriff’s office. It’s apparently designed for Playmobil figures, but you can scale it to whatever size you need when printing.
The Gaming Corner has twenty different Blood Bowl pitch designs free for the downloading. Just print them out and glue the pieces to cardboard. The site also has Blood Bowl rosters and a quick reference sheet.