ftp://ftp.cse.buffalo.edu/pub/FreeBSD-Archive/old-releases/i386/3.5.1-RELEASE/compat1x/  direct

321 B  2000-07-19CHECKSUM.MD5  670+ mirrors
235.00 KB  2000-07-19compat1x.ab  310+ mirrors
235.00 KB  2000-07-19compat1x.aa  310+ mirrors
98 B  2000-07-19compat1x.inf  165 mirrors
52.37 KB  2000-07-19compat1x.ac  32 mirrors
3.16 KB  2000-07-19compat1x.mtree  11 mirrors
158 B  1998-09-21install.sh  1000+ mirrors