Not sure if it's in his catalog any more, but Norm Veber at Replicas and Miniatures produced a '50 Mercury dash. 1953 -1955 style Oldsmobile hubcaps very similar to the ones you're looking for in Revell's Ed Roth '56 Ford pickup and the Custom '50 Olds kit (solid wheel using Revell's wonkyish new wheel design), but the caps in both of those kits have the three spinner bars.