I did something similar with my 164.

When the first clutch cable broke I just made a new one out of steel cable and swagging the bits together.

It worked fine for about a year; it eventually started binding up a little so I replaced it with an OEM. I'm not sure what intern designed the clutch cable mechanism on the 164 but it required 4 thumbs and 6 elbows to get that sucker in there.

Anyhow -- the home-made setup worked pretty well and would have lasted a lot longer if I had put a little more effort into finding the right gauge cable (the stuff I used was too small so it sawed through the housing and through a bit of the firewall as well. Oops!) I had just threaded the new cable through the housing and swagged / crimped the ends on after the cable was in place.

So -- if my clutch cable broke again and I couldn't source OEM parts, I'd take the cable housing off and take it to an industrial supply shop and have them put together something for me with the right ends and the right gauge.