Would anyone have any information about this trek?
I found a vague mention of it on this web site http://www.btinternet.com/~Andes/othert ... a-trek.htm but have not been able to get any information about it so far.

Would really appreciate any personal experience, feedback, suggestions on who to contact.

Would anyone have any information about this trek?

The trek is detailed in John Biggar's (the same person who owns the website you link to) book The Andes, A Trekking Guide.

I do not have this book unfortunately.
Have you done the trek?