The following magazines have online archives:
Several 7ball issues have been added to Archive.org. They are spread over two accounts:
Also of interest is this collection of 7ball Gas Collection magazine CD samplers: VoxCorp, Inc.
Here is what is missing from the 7ball archives:
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:
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.