Hello BW,
I think that I've probably come across a recording that has some kind of connection to "Green Girl In Box". In the track "Circles", by artist "Osunlade", from their 2006 album "Aquarian Moon", there is an accordion/synth line that is, what I would call, an exact match to the accordion/synth line that is heard in "Green Girl In Box". Now the tracks are not a match but like I said, the accordion line is. So, I listend to everything that can be heard by "Osunlade", on Amazon.com, thinking that perhaps the accordion line was sampled from one of their earlier works and is perhaps the track used on the Green Girl Bump. I didn't come across anything else. There is one album of theirs, from 2001, called "Paradigm", but you can't listen to any of that album on Amazon.com.
Sadly, Amazon's thirty second sample of the track "Circles" does not have the accordion line in their short sample. The good news is, if you have a "Real Player Media Browser", you can search "Osunlade", in the "Real Player Music Store", and play their track "Circles", on the "Aquarian Moon" album, and hear 10 seconds into the sample the accordion line I've been preaching about. Pull up Bump Worthy, in another window, and play the "Girl In Green Box" bump side by side with "Circles". I think that you might agree with me that there is something linking these two cuts, because of the accordion. If I'm wrong, I'm sorry for this big, long post. I had to write quite a bit in order to explain myself.
Your Friend,
Ryan D.