E3 Team behind the E3 Flasher (Downgrading hardware, specially for Nor), has stated that they plan to release 're-signed' EBOOT.BIN's (A .SELF file) for 3.55 including the decryption keys so you can decrypt the EBOOT.BIN and 're-sign' it for any firmware lower than 3.55. They also were generous enough too include two more free EBOOT's. Here is their official statement quoted below: