How much did you pay for your scanner? I think good quality scanners are around 35000 Euros. Or maybe 1000 Euros to hire one and the services of a trained operator for a day (unless the designers are trained laser scanners too). I assume measuring the inside of a cockpit isn't something the designers need to do very often, well once for each type, and maybe they don't need the mega accuracy a laser scanner provides so maybe it's just simpler, and more cost effective, to use the old fashioned method. Any costs they incur must be passed on to the customer, mustn't they? This is just my opinion of course.