Not much in the way of 9.00 x 16 these days sadly. And bar grips are terrible tyres really. If you plan to use the vehicle you'll probably want something that is 70 or 80 years newer.
You might find 9.00 x 16 at some agri tyre suppliers.
But a quick look and pickings are slim....
This leaves old stock military take offs. But are usually pricey.
Or for even more money you could go for these, but bear in mind they are remoulds....
XZL 9.00x16 Tyre to fit 101 Land Rover
www.101parts.co.uk
A 9.00 x 16 should be a min of 34" tall, although in reality they could be as tall as 37".
This means something like a 255/85R16 is a tad too short. A 35.10.50R16 wouldn't be hugely off as they should be about 34.5" tall and only slightly fatter.
The Land Dragon CL18 is everything you expect from it. An aggressive mud terrain tyre specialized in 4x4, and nothing is stopping it. Quadrate design in...
tyresdirectuk.co.uk
These are aggressive off road tyres, but in reality are probably better on road and off road than a bar grip and would likely suit styling wise as they have big bar like lugs.