From what I can tell, the UUID is a combination of the first part of the product ID and the serial number. For example a DL380 G6 may have a product ID of "491332-001". So it will take the 491332 from that number and append the serial number of the server to the end of it giving you the UUID.
That being said, I could not find a table that holds that value, so I am guessing it might be calculated real time from the two existing sets of the data. But I am still searching - I will let you know if I find anything.
Nelson