ftp://ftp.ps.pl/dsk0/ftp.gimp.org/pub/gimp/v0.99/old/v0.99.21/  direct

664.28 KB  1997-03-14gimp-plugins-unstable-0.99.21.tar.bz2  23 mirrors
2.54 MB  1997-03-14gimp-0.99.21.tar.bz2  23 mirrors
476 B  1997-03-14README.gimp-plugins-unstable  436+ mirrors
199 B  1997-03-14README.about-xd  431+ mirrors
154 B  1997-03-14README.about-bz2  512+ mirrors
421 B  1997-03-14README  716+ mirrors