Yeah, there is pkg-get way.

If you don’t have pkg-get, you can follow the steps.

wget ftp://ftp.sunfreeware.com/pub/freeware/sparc/9/lftp-4.0.10-sol9-sparc-local.gz

wget ftp://ftp.sunfreeware.com/pub/freeware/sparc/9/readline-5.2-sol9-sparc-local.gz

wget ftp://ftp.sunfreeware.com/pub/freeware/sparc/9/libgcrypt-1.4.6-sol9-sparc-local.gz

wget ftp://ftp.sunfreeware.com/pub/freeware/sparc/9/libgpgerror-1.10-sol9-sparc-local.gz

wget http://sourceforge.net/apps/trac/gar/export/13001/csw/mgar/pkg/gnutls/branches/libgnutls13/files/gnutls-2.0.4-2009.01.22-sparc-libgnutls.so.13.9.1

cp gnutls-2.0.4-2009.01.22-sparc-libgnutls.so.13.9.1 /usr/local/lib/

ln -s gnutls-2.0.4-2009.01.22-sparc-libgnutls.so.13.9.1 libgnutls.so.13

pkgadd -d ./libgpgerror-1.10-sol9-sparc-local

pkgadd -d ./libgcrypt-1.4.6-sol9-sparc-local

pkgadd -d ./readline-5.2-sol9-sparc-local

pkgadd -d ./lftp-4.0.10-sol9-sparc-local

ldd /usr/local/bin/lftp

libexpat.so.1 => /usr/local/lib/libexpat.so.1

libgnutls.so.13 => /usr/local/lib/libgnutls.so.13