Ok I'm curious about this Peru event of yours :)
Found an online retailer Tifco Latinamerican Foods out of Toronto: http://www.tifcofoods.com/product.php...
If you can't find Inca Kola in town then they might be a good option at $0.89.can (plus shipping mind you). If you use them let us know how it goes and I might place an order myself.
An indirect longshot - you will need to do some additional legwork
Event put on by "La Asociación Cultural Peru en Calgary".
Click on the 2nd picture and look at the bottle on the table.
Photo is from May 2008 (by the EXIF data).
However, I can't find any contact info for the association.
Probably the website know how to find them but there doesn't seem to be anything actually on the website.
Or they could be defunct?