[R-390] Ungar/Weller(?) Soldering Iron Tips?

[quartz55]

I bought a bunch of large Ungar elements from ebay last year when I was 
working on those filters.  I remember seeing the screw on tips, you will 
have to do some searching, but there is still the stuff out there.  I 
use my elements with a lamp dimmer, after a few tries I've figured out 
where the temp likes to be for what I'm doing. I do like the large tips 
that don't loose heat when trying to solder some large BA thing.  
Getting them in where you need them is another issue. I got some pretty 
good deals though.

Dave