ftp://ftp.cse.buffalo.edu/pub/FreeBSD-Archive/old-releases/i386/4.3-RELEASE/compat21/  direct

268 B  2001-04-20CHECKSUM.MD5  1000+ mirrors
158 B  1998-09-20install.sh  1000+ mirrors
235.00 KB  2001-04-20compat21.aa  380+ mirrors
70 B  2001-04-20compat21.inf  199 mirrors
203.46 KB  2001-04-20compat21.ab  28 mirrors
1.36 KB  2001-04-20compat21.mtree  45 mirrors