Archival maging for the five highest proper motion targets in our sample. In all cases, there are no background objects directly behind the present day location of the target (red circle) that could be missed by the AO observations. Modern SDSS imaging can also rule out wide companions that may have been missed at wide separations, beyond the AO field of view, such as the companion which can be seen in the images of K2-10 (EPIC 201577035). All figures are aligned such that north is up and east to the left. All subplots are on the same scale.