If, after clicking the link to the Avsim libraray, the livery download does not appear/start, then I have to assume it is no longer available.

The first one on the list, the European Aircharter Boeing 737-200 (G-CEAG) by Fabio Leal, gives me the message "server not found"! :(

However, the second one on the list, the TAT European Airlines 737-200C (F-GGPB) by Fabio Leal, I get the download, and can choose to save it. :)