A couple years ago, SJS said that they got a batch of Duremes made on a special order. They still have them in stock.
https://www.sjscycles.co.uk/tyres/sc...50559/?geoc=US
At times their delivery fees have been reasonable, at times horrendously high priced to ship to USA. At this time the shipping fees are on the horrendous side of things. It looks like a minimum shipping fee is $49 USD. Not sure if that will get better or not, it is possible that Covid has caused these high shipping fees. And now with Brexit, maybe shipping fees will not get better?