I'm looking for a travel insurance for a man 66 years old, with a
heart condition, althoug stable. He's taking medicines also for
diabetes (non insulin-dependant), also stable.
He lives in Argentina and wants to travel to Switzerland for about 2 months.
So far, I've found the following advert (I think that it's for the UK
only, I have not called them up).
http://topquoteinsurance.co.uk/travel.htm#PC
"People with pre?existing illnesses or conditions.
Pre-existing conditions? Had difficulty in obtaining cover? Had a
serious illness and wish to travel abroad? Ring us on 08700 114340 and
we'll obtain a quotation for you."

Greetings Tateti,
Did you notice that that site specifies European Union residents?

IF the person has a health insurance policy in Argentina, perhaps it
can cover travel abroad for an additional premium  - or even just for
advice of the travel.  In Europe with private health insurance one can
get a chip card that allows one to charge major health expenses.

Here is the first site I found:
http://www.specialtyrisk.com/travel_medical.htm

If you click on HTML you will get a schedule of coverage and cost.  I
haven't looked at possible add-ons for pre-existing conditions.

Here is another site that I did not open further:
http://www.seguros-insurance.net/seguros-english/

Here is a more general site with "advice" that you can click on.
http://www.articleinsider.com/article/126090

Probably somewhere it will tell you to read the fine print very
carefully, and of course, with any health insurance, one must be sure
not to hide any pre-existing conditions.  I wouldn't go for the
cheapest but rather for the insurer with the better reputation  (if
one can find some information about response to claims, etc.).

Germany is not Argentina, but here I can get repatriation cover from
either of the two non-profit organizations that my wife donates to: 
St Johns, and the Maltese Cross  (both religion oriented help
organizations).  Our auto club also provides such.

I hope this is just a start of further suggestions.
Regards, Myoarin

Dear Myoarin,
Thanks a lot for your comment. I will go through it soon. 
Best wishes,
Tateti