Do it ur-self 1.6:1 /6 rockers

Bill Dedman said
The outrageous amount of money asked for the Aussie sets are reason enough for ME to experiment.

T&D Machine has 1.6 ratio slant six rockers available. Last I heard, about $800 per set.
http://www.tdmach.com/

They are not listed online, you need to call.