Certainly plenty of Taiwanese companies have little trouble manufacturing extemely high quality products such as Giant, Tern, etc. Some or the best designed and executed frames of all time come from those shores.
I suspect the manufacturers capable and willjng to produce the required level quality cost more than Andrew Ritchie was wanting to pay, making the question one of shekels rather than availability. Its not as if the current factory are making a particularly high quality produdct.