Rotatable Horizontal-to-Vertical Mount Plate Kit for Sony Alpha 1 / Alpha 7 / Alpha 9 / FX Series【SmallRig - DIY Camera Rigs, Stabilizers and Other Camera Accessories】
www.smallrig.com
It does not mentioned that the A1 II is supported but they may just need to update their docs as it appears to be a pretty generic fit. You also would need to check the lenses that it supports.
Thanks Tim... I did see that, however, since the A1 II is basically using the A9 III body, I am a bit apprehensive to order it. I just may have to call Small Rig and ask them.