Those goggles came with the helmet. Really cool thing about them is are not rigid and easily conform to the shape of your head with nice padding. Most comfortable goggles I have ever tried. Also has a winter neck thing that zips on and off. The materials are kinda cheap but really well designed. They do sell them separately but with the helmet are 18 bucks and shipping is $30. There are a couple on ebay that have em.
Yeppers Kev, Same as the Vespa (I think. Look the same anyway) Can't remember who I bought mine from but don't think it was from them.
Vespa Scooter Motorcycle Vintage Goggle 4 Helmet on eBay (end time 20-Sep-09 13:09:11 BST)
Here is one link;
New White Leather Half Motorcycle Helmet L Goggles COOL:eBay Motors (item 110425639724 end time Sep-17-09 09:04:29 PDT)