They are shipped with the cross-compiling sdk, here is a sample configure for rat
#!/bin/sh
CC=armv5tel-linux-gcc ./configure --prefix=/net/tester/zaurus \
--build=i686-pc-linux-gnu --host=arm-pc-linux-gnuoldld \
--x-includes=/opt/arm/3.3.2-vfp/armv5tel-cacko-linux/X11R6/include \
--x-libraries=/opt/arm/3.3.2-vfp/armv5tel-cacko-linux/X11R6/lib \
--with-tcltk-version=8.4 \
--with-tcl=/opt/arm/tcltk-8.4 \
--with-tk=/opt/arm/tcltk-8.4 \
--enable-ipv6 \
"$@"
I could not locate them in the native sdk though
hope this helps