V12/V13

I have a quote that has one product on it.  The product has an attribute (that never generates a variant) that represents the amount of a different product to include in the manufacturing process.  So the attribute looks like "partCount: (2,3,4)".  This is different on a quote to quote basis.  

Additionally, this is just an assembly part and incurs no extra cost, so I don't want it to show up on the quote as an optional product.  I also want to avoid variants, and keep it very minimal. 

In short, I was wondering if anyone knew how to make it so that no matter the amount x from partCount I select (2, 3, or 4) on the main unit, a manufacturing order is added to create x amount of that part.  Thanks.