If you can improve that verbal score a little, and maintain a 50/51 q, then you should retake. I would do 2 accounting professors and 1 of your co-authors, but that is just a somewhat blind guess.
You are selling yourself short a little. You should be able to get into some programs. Info systems is a much smaller field that hasn't been as hot recently. look at this list AIS Accounting Research Rank by BYU
It should give you an idea of where to start looking to apply. I would contact schools and see if they are doing info systems candidates. There are also non-accounting PhDs that are applicable. I.e. Doctoral Program : Department of Management Information Systems : Eller College of Management : The University of Arizona
If you are open to other fields, info systems probably doesn't have the easiest path, so you could look at financial/audit, or other things. But if info systems really interests you, you should do it. The career prospects should still be fine.