Once you have the AIAG Pak7, I would reccomend talking to your potential customer regarding any area's you have concerns over and agree together a PPAP package. I've found that whilst customers request a level 3 submission they don't always want or need you to collect information pertaining to all elements.
This way you can also show the customer that you understand the PPAP process (without being QS-9000 acreddited!) and also provide the service they require at a lower cost making you more competitive than other companies bidding for the work. If you don't get the chance before you submit your bid for the work, to discuss your PPAP with the customer, I would advise that if you are tendered for the work then make the meeting as soon as possible.
I would reccomend this approach as I notice you have less than 10 employees within your company. Not being QS-9000 approved you possibly won't be audited on this, however I would advise that you gain a waiver in writing from your customer to cover you should you ever be audited against complying with customer requirements. May look like covering you own back but make sure that you have some sort of procedure in place covering concessions / deviations resulting from customer requirements, your customer should then fully understand your reason for asking.
Hopefully I won't get shot down for the above, but from my experience talking to the customer and showing an understanding of the issue at hand solves 9 out of 10 problems.