Someone in packaging may be able to share specific procedures - I'm in food so can only give general advice.
FWIW I'd start by borrowing as much of your own procedures as you can. For example:
Section 7.1 is probably already largely covered by your existing supplier approval procedure, so I'd just modify this as needed to cover any extra suppliers / product types.
Section 7.2 can potentially be covered by what you've already got in place for 3.4 - again IMO it's easiest to integrate as much as you can, by using/borrowing from your existing established systems and procedures.
Section 7.3 can be built on your procedures for 5.6. You'll potentially have to add an extra risk assessment to determine the additional testing for these products you're not making, and also 7.3.2 may require additional thought - e.g. are your suppliers' labs accredited or do they do any ring-testing, and if not is there any external analysis you should be commissioning etc.This will be very specific to the type of materials and testing, so it's difficult to give anything other than general advice.
Section 7.4 can largely be built into 7.1 supplier approval - you want to make sure products are legally compliant before you buy them, and you're then (hopefully) not doing anything to change that status as you're just trading them.
Section 7.5 can be incorporated into whatever you've got in place for 3.1 - just add in any extra elements you need to handle the traded products (e.g. if there is different coding, different ways its tracked through your system etc).