Thanks again, Dave.
I´ve been in touch with Patricio for a couple of months now. I plan to meet him in Asuncion. It´s funny you should mention tires, because when I asked him if tires were readily available there, he said no. Raul in Ciudad del Este says they´re easy to buy there, however. I´ll only be about 50% used up by the time I get to Asuncion, so I shouldn´t need new rubber until maybe La Paz. Do you know how the availability looks in La Paz? It´s that 17-inch rear that gets us. I´ll be doing a lot of off-road in Bolivia, so I´d like to get new tires not long after getting there.
A number of folks have told me about the spectacular Argentine view of the foz. Last time I only enjoyed the Brazilian side, so I will surely make the effort to visit Argentina´s vista, this time around.