Hi Jim,
You can generate a .rpd file (binary file) which only contains the configuration data ( this will exclude the header from .jic file). If you are using your own processor to write the EPCQ device, then you should be using the .rpd file that contains the AS configuration bitstream. The .jic file can only be use correctly by the Quartus programmer when writing into the EPCQ/EPCS flash devices. You can refer to the following link on the steps to generate the .rpd file:
https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd11182013_802.html
Regards,
Nooraini