Just as an added suggestion, as I have been in the same position myself:
Many customers think they are doing you a FAVOR by requiring an annual PPAP submission 'only Lvl 1'. This is because they don't read the manual, and don't understand all the work that is involved. A Lvl 1 (or 2) is exactly the same as a Lvl 3, except that you only submit portions of the package, not the whole thing.
Rather than continue on like this, I have suggested to customers that what they REALLY want is a Lvl 4, consisting of a PSW, current material, heat treat and plating certifications, and any other updated documentation (i.e. changes to
PFMEA of Control Plan).
So far, I've had success with this, and have reduced my workload for annual submissions greatly.
If you do suggest this to your customer, and it is accepted, make sure you keep a record of their acceptance/approval.
Good luck