Hello,
I am a new member here, but I have been researching and learning about vintage, antique, and uncommon varieties of restraints over the past few years. I believe I have seen these above items posted on ebay, and thought they were interesting indeed. Hiatt has always been an interesting company, and this is no exception.
The closest thing I have seen to these is from a website called stationhouse, which, while it has not been updated in years, appears to have a small inventory of these swing thru type cuffs and irons with bars, as well as some of the alloy cast darby leg irons. I purchased a pair of the black enamel darby leg irons through them a few years back, and it was the 'fine thread' model, which appears to have a brass locking bolt and possibly a sleeve in the alloy key of brass, with finer threads than the rough alloy threads that other HT alloy cast irons have, which I have read are prone to strip. I am working on a write up and post about the cast alloy cuffs for this forum in the near future.
The website is
http://www.stationhouse.com/outfitters/ ... rchive.htm
Clearly the prices aren't what you might expect, but this website is old and outdated, and I had lengthy wait time when asking about inventory, so its possible they might be gone at this point?