Not as far as I am aware.
As you know the procedure is very similar with the custom needle, for standard flexies, but when it comes to the larger implants like the FlexEM, that would probably best be at the discretion of the installer and what they are comfortable with.
In my opinion, It would still be worth reading through and providing your potential installers with the following information
It would be nice if there was a paint by numbers 
for large flexies, but alas there isn’t currently.
Hopefully you can convince your installer to allow you to record it.
But as with @ItaBeAight, I think their refusal was justified, but you never know if you don’t ask.
In saying that, there are a couple of YouTube videos that would give your installer some ideas