What Is A Good Replacement For Dexedrine Er?

Updated
gwubrop Says:

I have an appointment with my psychiatrist this week and I plan to tell him about Amneal's discontinuation of Generic Dexedrine ER. That was the only authorized generic I could find, and the only version which worked for me.

Now that I can't get it, should I request an IR version, or is there something more appropriate? I realize my doctor is the best person to ask, but I'd like to know what to ask for heading into the appointment. Thanks in advance!