I'd like to hear any thoughts/suggestions anyone may have for what I'm trying to accomplish.  In some cases, but not all, I want to display a different part number from the Item Name/Number of an inventory item on customer facing forms (quotes, sales orders and invoices). 

I know the Display Name/Code field is designed for this but NS uses this value 100% of the time for every customer and every transaction.  I need to apply this to only some customers and only for some items.  I may need to use the alternate name for customer A but not customer B (this is why the Display Name won't work).  Some customers may have a few dozen items this would apply to and another customer may have a hundred but not necessarily the same dozen the other customer needs.