If I were you, I'd try some strat keystones as Derek suggested.
Another thought for consideration: You already have two teles with keystones in the bridge. Maybe the strat would be more useful to you if you let it be a little different from your teles. My band leader has a strat and a tele (60's type strat and 50s type tele) and they sound very different from each other. I think that added versatility will be worth having.