Ken, 8, 9, 10 and 11 speed road hubs all use 130mm OLN / OLD. Older 5, 6 or 7 speed hubs (120mm or 126mm) can be adapted to fit, either with a few spacers or a change of axle too. If your frame is 130mm, then my hubs (or any other road hub from the last 20 years or so) will fit.
There are 3 types of campag freehub body with 130mm OLN - the first 8 speed version, with all splines the same size, the second 8 speed version (exadrive) with one spline different from the rest to enable correct fitting of the cassette sprockets, and then the latest 9/10/11 speed freehub body which takes all 9, 10 and 11 speed cassettes, but not 8 speed ones. If you need an 8 speed cassette then you can either find an 8 speed campag hub, or adapt a 9 speed cassette to 8 speed spacing on a 9/10/11 speed freehub body.
Hope this helps!
Andy