Originally Posted by
fedechat
Make a reservation on LAN USA (non-resident fare), they will give you 3 to 5 days (or 24hs before your departure), then pay your reservation with your pesos at any Pago Facil, Banelco ATM or Carrefour Supermarket, that way you will pay at the official rate with your blue rate pesos

If the above reservation yields you a Peso equivalent total purchase price then this should work. Unless these payment locations have a maximum per transaction amount... Im not saying they do, just thinking out loud.
If you go ahead and do this, please do come back and report how it all goes.
Thanks,
Gaucho100K