You might consider using Lionel 364C slide switches, and #90 controller buttons.
They can get a bit pricey, but if one is patient, they can be found for around $5.00 each.
Currently I am using 364C controllers for my sidings.
On one of my control panels I used a bunch of porcelain based SPDT knife switches because I thought it would look cool. I would not do that again because they took up too much room, and having the handles stick up in the "off" position was bothersome.
I used double pole so I could select either A or D on my ZW.
The 364C switches are simple on-off (SPST).
Lionel also made a switch (390C) that was double pole, double throw, but I don't know whether they have a center-off position.