I just saw this for the first time - thought I would post just in case you still need the information.
International should be cheaper.
International part numbers off my last receipt from them:
1815923C92 harness, need two per side - one covers two injectors/glow plugs
1818350C2 valve cover gasket, need one per side.
Ford part numbers off my last receipt from them:
F4TZ*6584*A valve cover gasket (one per side)
F4TZ*9D930*K harness (two per side)
If you have the original under valve cover harnesses they have plastic clips to hold them into the plugs. Replacements have a wire clip instead, more stable and less likely to break.
Hope this helps out.
Dave / Believer45