This is the only white Sportwagon I know about. It's a 318, console and floor shift. It also wears the optional all aluminum wheels. Note these wheels had the cast areas painted gold for Sportwagons only. On all other cars the cast areas are painted grey. I have an extensive collection of photos of it. I believe it sold to someone in the New England area and haven't seen or heard of it since.
My '80 Sportwagon is a U.S. spec 318, A/C, column shift car with the stock styled stamped steel wheels. My '79 Sportwagon is a Canadian spec 360-2v, also with column shift and it's own, different than '80 styled stamped steel wheels. I've only ever seen one photo of a Volare Sportwagon and it was in a wrecking yard. It was a /6 car and looked like someone tried to jump a ditch with it. The car was bent at the cowl. I've check Aspen Sportwagon numbers. There were 254 '79s sold in Canada and the U.S. There were 80 1980 Aspen Sportwagons sold in Canada and the U.S. I haven't checked Volare Sportwagon numbers.
The yellow and orange tape stripes on the cars are common to both Plymouth and Dodge, the only differences being the grilles on the outside. Yellow/orange tape stripe is available at most body supply businesses.
Sportwagons were available with any engine/transmission combination available on a regular stationwagon. There was at least one 1979 E58 Sportwagon built. It has been wrecked but I have the fender tag from it as well as photo. It's not possible to determine engine/transmission installations on these cars.
Cars were available in vintage red, white, a nasty brown/gold colour and I believe, black. Bucket seats were standard and I believe the trim code for the seats on a Sportwagon is unique to these cars.
Any option not related to exterior colour, or seat choice is available. This includes belt mouldings, window frame mouldings, luggage rack, light package, rear deflector and of course all the power and HVAC options, even tilt and cruise. Technically the only available molding on the side of the car that was available was the rub strip to fend of parking lot dings and marks. No other mouldings on the sides of the car or the rear were available.