You will need to measure parts to see if they will fit. from 95-97 not much changed, headsets were on their way out in '96 to aheadset, and their sizing went from 1" to 1 1/8th".
If you've got the dates of, and the 7.2FX is form 2007 (
http://www.trekbikes.com/us/en/bikes/2007/archive/72fx), then there could be more, but you will need to measure.