Hi,
I'm not sure if I understand it properly, but here's my suggestion.
If you just need to extend the output pulse from the alarm system from 1 sec to 5 sec, you should be able to do this using a 555 timer circuit in monostable mode (just search on google for 555 monostable). You'll probably have to alter the resisitor and capacitor for the desired time (5 sec).
If you go this way, you would need 2 circuits, one for the lock > fold signal and one for the unlock > unfold signal. You can 'split' the output from each circuit into 2 (or have each circuit drive 2 transistors, to switch 2 different loads)
Also, if the pulse required by the mirror control unit is more than 200mA, you would need to use a transistor driven by the 555 to switch it (max output of ne555 is 200mA). I assume the pulse is actually driving the motor for the mirrors, so it will almost certainly be more than 200mA. It's probably safer and easier to use transistors to switch the load.
This will be a larger circuit than using a microcontroller circuit, but it doesn't involve any programming, or buyin a programmer.
Hope this helps