The following magazines have online archives:

Several 7ball issues have been added to Archive.org. They are spread over two accounts:

• Royal Magazine Group
• Vox Publishing (Issues #26 and 27)

Also of interest is this collection of 7ball Gas Collection magazine CD samplers: VoxCorp, Inc.

Here is what is missing from the 7ball archives:

• 7ball magazine #1, 2, 3, 5, 8, 11, 15, 18, 22, 25, 28, 29, 30, 31
• Gas Collections #2, 16, 21, 22, 23, 24, 25 (I think the samplers ended with 25?)

The complete ACM Journal PDFs can be found online, as well as the two issues of ACM Journal predecessor Alatheia.

There was a plan to release these for sale, but it never happened. Doug Van Pelt ended up uploading several back issues to the Internet Archive here: Doug Van Pelt. Here is what is missing:

• Heaven's Metal Issue # 14, 20, 21, 25 (#14 is there, but corrupted)
• HM Issue # 55-108, 110, 111, 112, 113, 115, 116, 117, 118, 119, 120
• Heaven’s Metal Fanzine (the reboot in 2004) Issues # 75, 77, 85, 91, 92, everything 94 and after

Christian Music Mags and Zines: a History - Dan Kennedy was making a list of his zine collection - sometimes just issue numbers, sometimes what was in certain issues, and sometimes he transcribed some articles.

Key Records - Jeani Bond’s website, with links to tons of photos, zine page scans, radio shows, and music to buy.