Where can I find Inca Cola (the Peruvian soft drink) in the UK?
Alternatively, can it be bought from the internet?

Dear Rai, 

I am sorry to say, that after a thorough search, I could not find a UK
vendor that sells Inca Kola (that's the accurate spelling). You can
always try, in the UK, eBay, as well as Latin American shops :

eBay.co.uk
www.ebay.co.uk

BBC: Latin food stores in London
<http://www.bbc.co.uk/london/yourlondon/unitedcolours/hispanic/contacts_links.shtml#food>

The good news are, that I found two online US-based vendors who ship
internationally and sell Inca Kola:

Mex Grocer
<http://www.mexgrocer.com/catagories-beverages-other-soft-drinks.html> 

Gran Tangolandia
<http://store.yahoo.com/gran-tangolandia/incakola.html> 

I hope this answered your question. Please contact me if you need any
further clarification on this answer before you rate it. Search terms:
"inca kola"
"inca cola"

Good work - unluckily it looks like it will be too expensive a mission
to get them to ship to the UK.

Hi.  I live in the U.S. and we're surrounded by Inca Cola.  Maybe I
could help you out?  If not, perhaps contacting CocaCola since they
now "own" Inca Cola.