Nothing official, no. I'd long thought about doing a version where you run all 18 sites from every block, going fellowship all the way to king block sites, maybe with every site 1 becoming a sanctuary, but I never actually did that. The game is sort of self-limiting with the sites, you'd need a huge deck in order to not run out of cards before finishing, but with a huge deck it will usually be tough to draw what you need for a certain strategy.