Ultegra 6402 freehub compatability question

[marin man]

I have a question for you tarmac demons,Which other freehub is interchangable with the ultegra 6402 freehub? Thanks in anticipation.
P.S.I beleive this was discontinued in about 2000.

I am looking for a spinergy compatible freehub other than a 6402 (which I can not find).