Hey,
Yes I know about them,I played such strings a few years ago until I switched to Fodera Diamonds and Optima Golds (unexpected great tone,BTW).
The EB strings you're looking for are branded "Pirazzi" and not "Pirastro".You might look here:
http://www.vielsaitig.ch/index.php/cat/c59_Pirazzi.html
(Swiss strore,I don't know if they sell/send in the US).
The same applies to these strings' availability,the Pirastro/Pirazzi are pretty rare birds outside Europe (of course,I mean the el.guitar/el.bass ones,NOT the ones for classical instruments).
Regards,