You can find the sparepart number of a component by entering one of the values from your units product label.

Product name: Searching by product name is a broad search that will return multiple product numbers of a particular product type. You will still need to select a product number from the search list provided.
Serial number (s/n): Using the unique alphanumeric serial number given to each product will return specific results listing all the hardware components that make up the whole unit. Best search option .
Part number/Product number (p/n): Using this number provides a breakdown of the product’s hardware components which will help determine the sparepart you are after aswell.