you can find them on "ebay-kleinanzeigen.de" once in a while (not ebay itself, but the local ebay adverts here in Germany)
at present there are probably 4 advertised from 250 to about 700 euros.
Trouble is nearly no-one will want to post such a big cumbersome thing!
be careful as many are advertised without mentioning that some of the fixings are missing, and then they become useless, as you cannot find these parts anymore, plus many are missing the lining in the 2 targa halves.
you were very kind now I check the site you provided me and see what I find, unfortunately in Italy it is impossible to find it and they told me that in Germany it is easier to find, thank you very much for having answered and helped me!!!!!