That the images on these plates are modern productions is, in my opinion, pretty much beyond dispute. Dr. Northover’s analysis supports an ancient provenance for the lead, but as others have pointed out, and as he stated in a note to me, there is quite a bit of ancient lead lying around, and the composition of the lead does not necessarily indicate the antiquity of the codices.He also notes that Mr. Elkington is offering photos for sale and Russian site has some good preview images. Note especially this scroll image, which is the first decent image of one of the lead scrolls I have seen. I allowed the possibility here that the scrolls could be something different from the main cache and could conceivably even be genuine. But this photo shows this scroll to have a menorah like the ones on the plates of the main cache (Elkington notes this too in his rambling, odd "report" to which Daniel links), which means it is probably fake too.
Background here and follow the many links back.