Service manuals are not allowed per FCC.
Umm..Not true.If it is please cite the code/statute..
For a radio this new it may be hard..
Radio shack used to sell SMs for most of their radios,
but Its been a crap shoot as of lately..
Maybe give RS Corp/Service dept,but you will likely need
a part/item number, Since they will ask..
I say RS because they have the sister to the whistler version.
Many have used RS SM's for theyre GRE's..
Maybe another member can chime in with that info...