I think China might offer promise as a source for these tires. I was looking for used tires for my stock trailer when I found 700 x 15 eight ply tires made in China for $60 each installed. More recently I bought 2 new front tires for my John Deere tractor. They were made in Thailand. These were a bit more expensive, they were 11L-15, 12 ply backhoe tires and cost $155 each. US made Ag tires are hard to find in our area. Getting them to learn how to make a fabric tire might be a challenge, but the Vietnamese learned how and others could too. Of course any new venture would entail a lot of risk, including competition from the present supplier.