I dunno, I think they've standardized around the 1 3/16" size stem. I think this pad is going to turn out to be one of those things you can't find when you want to buy it.
My old jack was purchased at Autozone about 15yrs. ago. Made in China, I think it's 2.5 tons. It has served me well, never had an issue with it. I just don't like the wide saddle that came with it as it tears things up due to its width
