well, I finally got around to watching my copy of Kevin Cashen's video on heat treating and he mentioned that Propper quench oil is hard to get, however, the video is now about 10 years old and Oil like parks 50 is not as hard to get anymore. as I am the one who suggested the site to the website I felt I should share that USAknifemaker.com which more seasoned members may recognize as MIDWEST KNIFEMAKERS SUPPLY sells both Parks 50 and Parks AAA. However, I am sorry to say there is one little hiccup and they do not ship internationally so for smiths not in the United States I am sorry to say this will not help.

Here is a link right to USAknifemaker.coms quench oil section: https://usaknifemaker.com/shop-categories/forging-tools-supplies-c-172/quench-oils-plates.html