Goa Trance Missions...missing volumes?

[vice86]

Hi folks..new member here. I recently discovered Goa/Psy trance and now love it!! Doing a lil browsing on iTunes and Amazon I found a 30 volume collection called Goa Trance Missions...only thing is that both are missing about 5 of the 30 volumes.

 

Any ideas where I can purchase the missing ones? I can't see to find Vol 7, 11, 15, 23 and 27.

[Goa-Head]

These are digital only as far as I can see. Maybe the missing volumes never materialised?