But as for EA3 (AKA 650a) rumor has it that some pretty nice 650a tires are available in Japan, where this size is popular.
Could be an oppotunity for an entrepreneurial minded Brit. Importing 650 A tires and rims to Britain. Like coals to Newcastle.
In France some 650B tires and rims are also imported from Japan and Taiwan. The exceptions being Hutchinsons and Schwalbe tiresand Ambrosio rims.