For all current and future builders of the A320, on Mycockpit.org there is fantastic freeware software called JeeHellWare developed by Jean Luc. Latest version is A320 FMGS_B16.2 and is somewhat similar to payware AST or Magenta s/w.
A320FMGS offers everything you need PFD, ND, SD, EWD, FCU, MCDU,… even FBW. Graphically is maybe not exactly up to the other, but it it’s freeware and in development so I can’t complain. It’s definitely worth a try if you are thinking of A320 cockpit. Thanks for sharing your work Jean Luc.
Some examples from user’s guide.