I made a new version of the freestanding sink which is now made up of two parts: the sink as a normal free hanging sink and the cabinet as a decorative item (found under paintings) with two recolorable subsets. The cabinet is slaved to the counter so now you can really match it to the kitchen when mixing top and bottom recolors. The items have a new GUID so if for some reason you want to keep the old sink still in your game you can. For placing the cabinet you might want to press ctrl + alt if there's already something on the wall.
The new sink is included in the main download. You can also download it seperately here: