I've bought quite a bit at Sultan's and he has a load of jacketing and pretty much anything else you might want. The shop can be a bit overwhelming, so best to go with an idea of what you want.
Some of the bolts are claimed to be Zegna, Scabal, Loro Piana, but contain no selvedge. While I've had success with some of those, and they are generally cheaper, you purchase at your own risk.
His shirtings are also excellent. He's got everything, cotton-linen,...