The early star 4 cyl cars came with a simple 3” round red concentric glass lens. So you will never find a oval celuloid star 4 lens.
Perhaps over the years owners purchased a replacement chevy style tail lights from one of billy durant parts sales,
(Orphan cars shared parts of other cars)
Our star 4 also came with an add on “curved STOP topper” that was clamped on top of the concentric housing.
Hope you find something you like, happy hunting!