Photoshop can alter prospective wonder if there is a way to reduce the curve or maybe adding to much pincushion correction I am sure there is a filter in ps that allows one to add a curve.. worth looking maybe
Edit just done a web search there seems to nothing directly linked to what you want to do but depending on ver of photoshop the free transform tool or Spherize is suggested to sort out distortion of wide angle lens, fish eye, maybe you could use this as a work around
Rem to save images first and work on the copies just in case it does not work