According to my old FASA book, Chapel was 2 years older than Sulu and Uhura 2 years younger than Sulu but it can't be considered canon. I saw a script for Miri where Rand claimed to be 24 years old, making her 3 years older than Chekov and 9 years younger than Kirk who were cited as 22 and 34 the following year. The line never made it into canon and FASA had her listed as age 26.
Kirk - Ben Browder isn't a bad choice if he could reign it in a bit
Spock - ?
McCoy - ?
Scott - Paul McGillion
Sulu - ?
Uhura - Lanei Chapman?
Chekov - Andy Bray - I've been very impressed with his Phase II portrayal!
Chapel - Tricia Helfer
Rand - Ali Larter
Kirk - Ben Browder isn't a bad choice if he could reign it in a bit
Spock - ?
McCoy - ?
Scott - Paul McGillion
Sulu - ?
Uhura - Lanei Chapman?
Chekov - Andy Bray - I've been very impressed with his Phase II portrayal!
Chapel - Tricia Helfer
Rand - Ali Larter