Hi everybody,
to keep things clean (as the other thread is about another type of legacy interface), I start a new thread.
As suggested, I contacted Bedford Unicycles and Darren confirmed that he still has KH/Onza cranks in stock in 140mm, 150mm and 165mm ($75 a pair). He also has in stock the other related accessories (spacers, bolts,…).
Contact email is darrent@bedfordunicycles.ca and the full price list in on their site (http://www.bedfordunicycles.ca/pricelist/bedford_pricelist_feb2009.pdf).