So you think two years ago is ancient history?
The "era" hasn't exactly changed yet.
Fortunately, figuring out which packages contain those libraries isn't (usually) rocket science. For example, libgpg-error.so should be in libgpg-error-*.rpm and libgnutls.so in gnutls-*.rpm etc. If in doubt, use Google/pbone.net/rpmfind.net or something. I bet the person who made that lftp package also provides the other necessary packages.
If you don't fancy downloading and installing by hand, install (and configure) APT or YUM.