Feel free to join the DLK Fan Page on FB, several members / experts were employed by DLK and are quite familiar with the manufacturing and the components.
The woofers were generally custom made by DLK using frames from manufacturers. The voice coils were designed by Don, and in some cases manufactured by hand by DLK.
Don, was known for designing X-Overs for many of the speakers of the day
Oh and I would be interested in whole sets and/or parts for DLK's
Thanks
Mike