[Dx-qsl] An old one: KG4SG on 80m

[Roger]

I tried this post before but I got no replies. I am trying again, in the 
hope someone can help.

I worked KG4SG in Guantanamo as follows:
Date             UTC   Mode  MHz  RS sent RS rcvd
30 November 1989 01:22 SSB   14   58      58
30 November 1989 02:09 SSB   3.7  44      53

The operator gave his name as Sid. He asked for QSL via KK8X. I sent some 
airmail QSL requests to KK8X (of course with SAE and return postage) in 
1990 and 1992. Third and fourth requests were later sent via the bureau. 
For some unknown reason, I never got any reply.

Guantanamo is really rare for me on 80 meters and I would like to get this 
card for my 80m DXCC endorsement. Does anybody have any further info on 
this one, maybe another QSL manager?
73, Roger - PY1OL