It didn't take much google to find this:

http://www.taiki-jaws.com/

http://www.thame-eng.com/Trueborer.pdf

Dorian appears to resell Taiki stuff as well.


And a US source:

http://www.ajaxjaws.com/wizzc/wizzg.html

http://www.usshoptools.com/current_y..._08_pdf/PGS_36.
pdf


Huron Machine Products may have been the original US source.