Buying a new FACP, need backdoors.

[FireAlarmPanel347]

Hello, my MS-2's NAC got fried because I was stupid and changed my Gentex Commander 3 to 4-wire while in alarm. I am looking for a replacement panel, preferably one that has an LCD. I found these options:

Notifier SFP-10UD (Fire-Lite MS-10UD-7)

Notifier SFP-5UD (Fire-Lite MS-5UD-3)

Simplex 4006

Simplex 4010

I don't know if I will be locked out of these, so does anyone know the back door to them? Thanks!

P.S. These will only be shared via DM as per the forum rules.

[WorthyGamer]

Hi! This is a little late, but I previously owned a locked Firelite MS-5UD that I bought off of eBay, so I do know the backdoor to the SFP's. I don't know, however, the backdoors to the Simplex's. I can send ya the PM when you need.

[FireAlarmPanel347]

Please do.