@nicnac late reply pero sana makatulong. For US police clearance, it can take up to 3 months or more. May backlogs din sila sa processing.
So what we did was go through an accredited 3rd party (the official list is here: https://www.fbi.gov/services/cjis/identity-history-summary-checks/list-of-fbi-approved-channelers-for-departmental-order-submissions).
Pinili namin yung https://accuratebiometrics.com/ and then selected the option that they will send a physical copy to a US address but also send you a PDF copy (details here: https://accuratebiometrics.com/by-mail).
You'll still need to go to PNP Camp Crame for finger printing (using the downloadable form for the prints, not the PNP finger print form). Then we sent the prints via DHL. If I remember correctly, within 24-48 hours of them receiving the finger print cards we already got the FBI clearance online and submitted that (hindi na namin hinintay yung physical copy). It's more expensive pero worth it kasi di ka na maghihintay ng matagal. Payment was via credit card.
Hope that helps.