Old Style Blue Circle Cue Balls - Wanted

[OldHasBeen]

I am trying to find where to buy the old style blue circle cue balls that we all used before the red circles became popular. I just recently became aware that the red circle is actually smaller than the object balls and therefore have a different effect on alost every shot, especially banks.
There are quite a few dark, heavy blue circle que balls available but what I'm looking for has the thin light blue circle.