Hi Tim
My apologies having done further investigation you are correct, it is a pity that someone who bought and owns this series does not make copies available. I believe I have posted on a different forum here before that maybe the copyright has lapsed as Activity Media probably are know longer trading (need to look that up) and that it is a problem someone does not make copies available for a small charge. Then again someone might still have a legal right to them and does not need the pocket money.
Regards