As far as I remember, most of the non-prime material planes are unmapped (or only vaguely so) because they are usually infinite in size, impossibly chaotic, or both.
Anyway, I was actually kind of stumped because I've never heard of Abaddon in D&D. Did some research and it looks like it's purely a Pathfinder concept, and even then only referenced in a single book with any sort of description (as far as I can tell). Assuming pathfinder planes follow the same general concepts as D&D, there's unlikely to be any kind of map for them.
That said, have you tried asking in the Pathfinder forums?