Just a few thoughts to maybe help get you thinking...
1)How do you select the products you distribute?
2)How do you select the vendors for those products?
3)Do you have a repackaging operation?
4)Consider incoming inspection of the items you stock.
5)Consider filling orders as an operation to plan.
To help get in the right frame of mind, remember that the P in
APQP can be for either "product" or "process".