Ecommerce "manufacturer" tracking


Hello! I’m trying the 30-day piwikPRO demo.
My question is about the ecommerce part.
We’d like to filter our product name statistics (say, iPhone, PG939345, Surface, etc) on manufacturers (say, Apple, Microsoft, Dell).
That is, we’d like to generate reports where we can see how many views “Microsofts” products had on our page, and vice versa for “Apple” and “Dell”. As far as I can see now only SKU, category and the product name is tracked. Is there a way to use custom variables for this?