According to some PDF documents at FCC.gov, it seems that ZipZaps are manufactured by Ka Wah Manufactory Limited, a toy manufacturer in China. To access these documents, go to the
FCC ID Search Page, enter 6007001 where it asks for the "Equipment Product Code", and click the "Start Search" button. (Note: 6007001 is the EPC for 27 MHz, and 6007002T is the EPC for 49 MHz, as printed on the rear of the controllers.) On the results page that appears, click on the "Display Exhibits" icon to bring up a list of exhibits. Within the "block diagram" and "schematics" documents, Ka Wah is shown in the lower right corner.
The schematics document may be useful for performing mods, and the exhibits also include a PDF version of the
ZipZaps Owner's Manual.