there have been several generations of the club speaker cables.
We started with 6-8 strands of 18ga silver coated copper wire per lead. Source info for this build is on our web site. Sign in as a member and go to Documents, then DIY wire and terminations (PDF). This will also give you contact info about the supplier. Source info for banana termination is also there.
The next generation was a single strand of 8 ga silver coated stranded copper per lead from the same supplier. I do not that he has this wire in stock any longer, but you can call to find out. I have found that 2 strands per lead of the 10 ga or 12 ga wire works just as good in my system.
All of the wire mentioned above has Teflon coated insulation.
If you can get all the parts, Sam Papadas may be willing to make the cables for you for a reasonable fee plus mailing costs. Contact Sam directly if you are interested in goining this route.
if you are interested in going with the multi stranded 18 ga wire, I have enough of this on hand to do your job. I just think that all of us think the heavier gauge wire sounds better.