[TowerTalk] Air core balun

[Roger]

All,
Back in 1988, I bought two air core baluns from a brazilian manufacturer, 
ARS Eletronica Ltda, from Sao Paulo. Now I need a few more units. 
Unfortunately, I think that that brazilian factory no longer exists.
So I had to make a balun myself. I put some pictures of it on my WEB page.
http://igspot.ig.com.br/rmurad/balun.html

I would like to know if these baluns are still being produced by any other 
manufacturer elsewere, so I could buy the other units I need. If you know 
about, please, send me an E-Mail with the URL of the manufacturer. Thanks!
Roger - PY1OL
rmurad at superig.com.br