Doesn't really help but - I never found a local place that could supply or was interested in supplying these or similar clamps. In the end I did get a quote for a local brisbane shop to make some up but it was more than five times the price of shipping some over. And that included setting up a US forwarding PO box for a year.
In the end I went Fugly, U - bolts and Mitre 10 steel section. Did the job, and survied a week bashing about hard on frazer in the CJ. Moved it all, with some modes to out TJ and still no problems.
If you find someone local - post it cos they still look schmick