Robin Krout,
In
http://www.jewishgen.org/jgff/jgffweb.htm you can find other researchers who are looking for (and hopefully have info on) HAMPEL from Pabianice and Lodz:
Ellen Konwiser (#12956)
E0913@aol.com Mark Hampel (#32705)
mwesley9@yahoo.comContact them.
Good luck,
Amram