For info, I recieved a positive reply from Lan Peru to my request for a status match. However...

It took 3 months (one of the excuses was the extra work the upgrade to the LANPASS site caused)
I originally sent them the needed information in an email and 3 weeks later they asked for the exact same information in their required format (PDF of recent statements and copy of card)... it is like dealing with anal 12 year olds.
They were clearly not knowledgeable about Aeroplan, not surprisingly, so they came back with more questions for which I had already proactively provided the answers.
They eventually offered PREMIUM to match my Aeroplan Elite... the correct match would have been PREMIUM SILVER, but, really, they are impossible to deal with.
The irony is they took so long to answer I already achieved PREMIUM on my own this year... so the offer to match to PREMIUM, when I already have it, is pretty much lame... but why expect any common sense from the back offices of Lan.