Silvie, that's what I thought you were saying regarding home banking. I believe you, but I don't understand how you're able to do that. Everyone I spoke with (both in and out of the banking/financial community) stated that my international wire transfer to my dollar account in Argentina would be converted into pesos at the official rate (termed pesofication). This includes many people without a vested interest, only trying to help and not to steer business their way.
This issue isn't one important to me now personally, as I've only needed to obtain dollars in Argentina to purchase a house, which I've already done. But you may be able to help others trying to buy a house or apartment, which was my reason for starting this thread.
Western Union and similar business are used to, ultimately, obtain pesos not dollars (though the initial denomination sent is dollars). Do you wire yourself dollars, collect those dollars in Buenos Aires, then at some point find someone to exchange those dollars for pesos (which I assume you use to live here)? This question is actually about currency rather than your personal financial habits --- following the money, so to speak.