I was told by someone at Yokohama tires (from engineering) that these load tables are a generic set of specs published by the wheel and rim association (or something like that, I'm not going to look it up now). Anyway, he said that it's the same data specs they all use. It's just some companies publish it, others don't.
So IF all that is true, you should be able to look it up by size and load range...no matter the series or even brand
I have no reference or way to confirm, just the verbal during a phone conversation... but it seems plausible to me.