okay. this might be a long shot but i need help.

im doing an archival project for art from one specific artist and its starting to screech to a halt because i can no longer find new things, and theres a lot of stuff i know exists but i just can't find. i think its mostly due to me not knowing where to look, which is why im seeking help.

does anyone know where i would be able to find/read adult japanese manga magazines from the 90s to the 2000s and possibly up to mid 2010s? thats where i end up finding a lot of the art im searching for

stuff im looking for specifically is comic zip, comic papipo, comic tenma, and dengeki moeoh