The lever shape appears much more accurate on the noob. I also think the bezel markers look a lot better on the noob the pearl for sure. I guess we have different takes on these.
Here is a link to buy some on ebay.
http://www.ebay.com/itm/Replacement-Screws-your-Panerai-Radiomir-Watch-/390309714516?pt=UK_Jewellery_Watches_WatchAccessories_SpareParts_SM&hash=item5ae0459a54