Dave,

I don't really think you need switches,
besides one of the switches you would need is no longer available.

If the switches were bad, your problem would be constant, not intermittent.

Were it me, I would attempt to realign the door switch mounting assembly.
and check the latch hook assembly on the door.

A) You may even want to remove the assembly and clean the mini plungers on all the switches.

B) I used to use "star washers", when remounting the switch assembly,
they help to hold the assembly screws tighter and grip the plastic housing and holds the mounting bracket in place longer.(you can get the washers at any local hardware store).

Apparently, you've been inside the control panel assembly, at least,and are aware of the possible shock hazard(s) when working in that area.

Good Luck,
:) :) :)