Peru (above) Volume 2 is available on Abebooks UK for a reasonable price @jhb171achill
https://www.abebooks.co.uk/servlet/SearchResults?isbn=9781900095365&n=100121501&cm_sp=mbc-_-ISBN-_-new
Volume 1 is on Amazon but you probably don't want to know the price (well, double this one)
(I'd create a want on Abebooks for Vol 1 if you wish)
The book from the website, a little pricey (but I don't know the original cost), maybe worth it to you?
https://www.abebooks.co.uk/servlet/SearchResults?cm_sp=SearchF-_-topnav-_-Results&kn=0992862205&sts=t
Will you be needing any GL8 derivatives from EMD for this railway at all?
FERROPAR EMD GL8 Tubarao, Brazil 2005
Argintinian GA8 ALL