Hi. I don't believe there is a dedicated layer stack for single sided boards of any kind. I would expect you can just use a two layer stack and ignore the bottom layers both while editing and when generating Gerbers.
Altium Designer can do it.
Eagle can do it.
KiCAD can do it.
Why is such simple functionality removed from CS but simulation and vault and other eye candy so important?
I make a lot of boards for high power LEDs. It is common in the industry to use aluminum core boards for this type of application. An aluminum core board has only top layers (silkscreen, mask, solder, and top layer) followed by a thin dielectric layer and then the aluminum substrate. I cannot figure out how to build this stackup in CS. I can delete all but the copper layer on the bottom and I cannot rename or change any property of that layer. I can add layers all day long - as long as they are signal, dielectric or internal plane. Has anyone made such a stackup?