The Kaos is such a basic design that enlarging a set of plans digitally and then printing for the build might be the best way to go nowadays.

I would go with the Kaos 90 plans (downloadable) and go from there enlarging them to match the Eureka 120 cores if desired. Of course, simply building a Kaos 90 and installing a 120 (2s or 4s) is not a bad option either! :-)

David