Variant Listing Indication

With listings on Amazon, Etsy, Onbuy and others all being imported into storefeeder as child variants individually rather than as a parent, it would be nice to have some sort of indication on the parent product page which child variants have listings on channel. We currently have to view each child variant individually to see if their is a listing present on channel or check the channel directly, perhaps a hover over pop up when scrolling through the variants would work.