Old Armstrong type tires - Still available?

[vectorit]

Hey all,
I am finishing up a restoration on a 1968 K20 4x4 Suburban, and back in the day my Dad ran nothing but the Armstrong off road tires on it. Also, from the dealer advertisments the truck was shown with these type of tires from the factory. (Skinny, tall, and aggressive tread).
I am not concerned about what is better, or bias ply compared to radial here I am just looking for originality...

I still have the original 16.5 split rims that came with the truck from the factory, so I am looking for something that fits this type of wheel as well.

If nothing like this is still being made, what brands should I be looking at that will come the closest to what I really want?

Thanks!