That page is made up of many files/documents. Only the product-finalize one (forget its exact name) will have the info you need.
Its browser dependent, but go to the manage page and view the source (often ctrl-U). That should bring up a debug area with the list of files and you will see the product-finalize file. Search just that file for the vin - 5yj3 - it *may* be what you are after, but it may not. Alternatively search for "vin" including the double quotes. You should see 8-10 matches for "vin" - look at each one and see if there is a vin attached. Some of the references are irrelevant fields, one is not - the field immediately before "insuredVIN"