Fignon is right - the 8s RDs had different geometry to the 9 & 10s gears so whilst 9 & 10s RDs are basically interchangeable, the "8s" can't be replaced with a 9 or 10s. The change was made in MY2001.
You need a Campag RD with a "B" screw positioned on the mounting plate in much the same way as Shimano.
Fignon is right - the 8s RDs had different geometry to the 9 & 10s gears so whilst 9 & 10s RDs are basically interchangeable, the "8s" can't be replaced with a 9 or 10s. The change was made in MY2001.
You need a Campag RD with a "B" screw positioned on the mounting plate in much the same way as Shimano.
If you are after NoS, try http://www.campoldy.com - Nigel Scott usually has stock ...