Old ones are no longer available. All you will get is the new one. Bolts are not easier to get on, but it does have an extra stud in front of the hole that goes through the fender. It stops the front of the snorkel from pulling away from the fender
Concrete - I got one for your momma. Look at them again and tell me with a straight face she wouldn't dig it.
Actually when I got mine, I was told by ARB that I had gotten the first new style in the country. So I had ordered both of them since no one had a good pic of the difference. I then sold the old style to a dude in CA that stiffed me Sent him some other stuff too. That's the only time I've ever had that happen from anyone with cruiser stuff (excluding the troll at cornhole connection and some guys that took like 1 year too long to finish an unfinished product).
The SS81HF is the current and correct model for the US, not that the old ones were too difficult to make work. ARB had a few of them left during the transition but I'm sure those have been gone for a long time...