Team Rocket Theme and The Rocket Encounter if I recall correctly haven't been published in MIDI form, since they're our most recent pieces (You can try to get Irot_Rebod to send them to you if you can catch him).

I tried looking for Cianwood in my folder and I couldn't find it, so I assume it's a similar situation for this one. Have you tried modifying the HGSS version to reflect Irot_Rebod's version?