I have found that forks have gained in height a lot in the last 10 years - even with the same travel and intended purpose.
Modern (2007 ish) 80/100mm XC forks are about 4cm taller than my Pace Evo 2's and totally changed the ride of my 2003 bike when I upgraded so I could run disc brakes. Forks I compared to include Pace RC39, Rock Shox, Fox and Magura all with the same travel and all had about the same height difference.
The fact is frame geometry has changed a lot and the forks have changed with it. Try to get various models measurements and compare them to your old ones, then get the closest if it's within reason. Otherwise I'd head over to ebay and search out something of a closer year to your frame.....