Got this reply today from FBI:
Thank you for your inquiry,
According to the FBI's records, your request was received on approximately 3/6/2017 and is currently in process, we are finishing mail received on approximately 3/3/2017. All responses are mailed through the US Postal Service First Class Mail please allow standard mailing time (three weeks in the US and four weeks outside the US) to receive the response. There is no tracking number with the US Postal Service First Class Mail. Responses cannot be emailed.
Thank you,
If you need further assistance please contact:
Federal Bureau of Investigation (FBI)
Criminal Justice Information Services (CJIS) Division Biometric Services Section Customer Service Group
(304) 625-5590
Office Hours Monday-Friday
8:00am-5:00PM EST
Identity@ic.fbi.gov