I know that there were indeed stage 1 downloads available in 2007 that were street legal.  The dealer could download via digital tech.  they were charging 150.  For basic muffler air cleaner upgrades.  This is not the SERT.
Not for the CVO line.... Here are the 07 Flashes that are available through DT on an 07 FLHRSE
Search Results: 2  Applicable Calibration(s)    
  Street Legal/Race: Street Legal 
  Digital Tech Part Nbr: 34432-07C/DT 
  Calibration ID: 34432-07C 
  Description: 
STOCK OE WITH ENGINE IDLE TEMPERATURE MANAGEMENT SYSTEM     Restricted Power: Unrestricted - (Full Power) 
  Req'd Configuration:  
  Region: United States of America (Remaining 49 States)  
  Model Year: 2007 
  Platform: CVO 
  Model: FLHRSE3 (CVO-2007) 
  Exhaust System: Original Equipment (Legal) 
  ECM/ICM: 32498-05,32498-05A,32534-05,32534-05A,32534-05B,32534-05C,32852-06,32852-07,32852-08,32852-08A 
  Cylinder Heads: Original Equipment 
  Engine Displacement (cc):   1800 
  Fuel Injectors: 06-08 Twin Cam 25 deg Injector (27709-06 / 06A) 
  Air Cleaner: Original Equipment 
  Throttle Body/Induction 
    Module: Original Equipment 
  Cam Shaft: Original Equipment 
  Pistons: Original Equipment 
  O2 Sensor: Original Equipment 
-------------------------------------------------------------------------------- 
  Street Legal/Race: Street Legal 
  Digital Tech Part Nbr: 34425-07B/DT 
  Calibration ID: 34425-07B 
  Description: 
STOCK OE     Restricted Power: Unrestricted - (Full Power) 
  Req'd Configuration:  
  Region: United States of America (Remaining 49 States)  
  Model Year: 2007 
  Platform: CVO 
  Model: FLHRSE3 (CVO-2007) 
  Exhaust System: Original Equipment (Legal) 
  ECM/ICM: 32498-05,32498-05A,32534-05,32534-05A,32534-05B,32534-05C,32852-06,32852-07,32852-08,32852-08A 
  Cylinder Heads: Original Equipment 
  Engine Displacement (cc):   1800 
  Fuel Injectors: 06-08 Twin Cam 25 deg Injector (27709-06 / 06A) 
  Air Cleaner: Original Equipment 
  Throttle Body/Induction 
    Module: Original Equipment 
  Cam Shaft: Original Equipment 
  Pistons: Original Equipment 
  O2 Sensor: Original Equipment