Fedon themselves seem to have upgraded their line of products. I think they are lost forever. No way to buy them. I also did not stumble upon something very similar, i.e. in identical look, for quite some time now.
Looks like the only way is to go to one of their stores in Italy or get lucky on eBay. They still make in trays (A4 size). They look like the photo above without the metal bracing around the outside, and I believe they are made of faux leather.