You need the freehub body off the next to last design Mirage hub (2004ish to 2006). It's the one with the same bell shaped shell as your 8 speed hub. The last generation Mirage hub (2007-2008) has a straight tapered shell, that FH body won't work.
Most Chorus/Record 8 hubs will require a custom spacer to make the Mirage FH body work. Several folks here are running 8 speed hubs with the Mirage FH body.
See this thread for a pic of the Mirage FH body that won't work, it's in wallyman's post.:
http://forums.thepaceline.net/showthread.php?t=106535