B&H tells me that they just got a shipment of imported TC-20E III converters. I've verified that they are listed as "In Stock" as I write this (which is why the headline is what it is). For TCs, I don't judge buying an import to be a large liability. They don't have a plethora of proprietary parts that can't be obtained by non-authorized repair centers (though if you scratch an element you might be out of luck).
It lasted less than 30 minutes...