apt-get source gcc-3.0
apt-get source binutils

cp binutils<ver>/binutils-<ver>.tar.bz2 toolchain-source
cp gcc-3.0-<ver>/gcc-<ver>.tar.bz2 toolchain-source
cp gcc-3.0-<ver>/debian/patches/* debian/patches/gcc/

combine gcc-3.0-<ver>/debian/rules.patch debian/patches/gcc/rules.patch
  set "patchdir        = /usr/src/toolchain/patches/gcc/" 
  DEB_HOST_ARCH -> TARGET_ARCH
