I have a lot of Avios I am planning on using to go to South America last year, but I am not particularly familiar with Iberia, I usually us BA, but am using Avios as the taxes are so much lower.

I wanted to book two one way business class flights from Madrid to either Buenos Aires or Montevideo but had the following questions:
-Do Iberia operate flat beds on both of these flights, from expert flyer it looked like flights to Montevideo do not?
- I am struggling to get the flight finder on the Iberia website to work it shows me availability but when I try to view flights it throws up an error. Is this a common problem and if so is the alternative to ring Iberia to book?
- As I am getting the above error can anyone confirm the number of Avios required, I think it is 51,000 off peak on the new reward charts but am not certain

Thanks in advance