libc5 xlib packages

[Gregory Stark <gsstark@mit.edu>]

Where would I find these libraries for libc5? Even if I have to install a deb
package built from old X sources a couple years ago, at least my binaries will
still run.

        libXt.so.6 => not found
        libSM.so.6 => not found
        libICE.so.6 => not found
        libXmu.so.6 => not found
        libXext.so.6 => not found
        libX11.so.6 => not found

This doesn't seem the be in the XSF FAQ or anywhere else I can find.

-- 
greg