Whats right offset/back spacing on aftermarket 22X9.5 wheels

[Slow5.0]

I was wandering whats right offset and back spacing for 22 x 9.5 wheels.
I was thinkin about buying Liqouidmetal wheels from discounttiredirect but i wanna hear what you guys think about offset

 

[blueflamed03]

I think NNBS like 30-38mm?? Not 100% sure, but think the deeper + offset