Yes, the Luftmeister turbo kit was certainly available in that period, though I think was much less commonly found on airheads in North America - possibly as there were even fewer dealers over here who would know how to deal with it.
It was popular as Kawasaki, Honda, and Yamaha all came up with mid-size (500-750cc) sport bikes with turbochargers intended to offer liter-class HP (once you got through the lag) but otherwise fuel economy and docility of the middle class. I briefly rode the 1982 XJ650J Turbo that a local dealer had on his sales floor for 3-4 years before selling it, only to have the new owner trade it back in later that year.
In general, I think the turbo bikes of the time promised alot more than they delivered, but they did have a certain cache', and were kinda fun in a straight line when the turbo came full on.