qgis - Printing a 1" scale from 2.8.2 Print Composer

I'm working on a small-scale site survey in qGIS, and for engineering purposes I need to print physical copies of the map that can be used with an engineering ruler.

Basically, I need a way to print a scale bar that has intervals that will actually be 1". The map is at 1":500", and I'm using NAD83 CA State Plane V (ft). For the life of me I can't find an option that lets me dictate the size of the scale bar on a paper map. I am printing as a raster, rather than scaling to fit the page, but still no luck.

I'm having the issue that's detailed here but that solution is for ArcMap Layout, and I need to use QGIS Print Composer.