From what i've asked and I have tried, including asking top reps and tech guys.... The answer is NO! and a Big NO at that. They may be able to at the factory, and im guessing at that
Tell the customer to ask the original installer for a copy or ask them yourselves.
If they are going to switch installers its their right.
You be surprised how helpful it is sometimes to ask. Just be prepared for a no, but understand you may approach this in a nice way and get a YES...
Are they done with the system and have they gotten paid....check that first and beware.....Ive been called to finish a system that was never right from the get go....turns out they never finished since the owner never settled up..