Yeah, you're pissing into the wind with this one.
Even teams like Florida who had 5 of their guys play over 150 games, changed catchers and OF's mid-season.
You use the Astros as an example of a team not to use but they were probably one of the more stable lineups all season, despite getting Beltran mid-year.
If you really still want to go after this one, I can tell you that the Padres possibly had the most settled lineup in the majors in 2004, without being affected by any trades or significant injuries.
still having said that, Terrence Long ended up playing more games than Klesko and Burroughs missed the last few weeks of the season.
Good luck but I really think you are on a hiding to nothing.
When you're right no one remembers, when you're wrong no one forgets - NZF