The pin swap (2 and 3) only works on 812, and 218
Mark II, 518, and 1220 and some others. The older 1016, robocolor I and II, 218
Mark I and some others needs a
protocol converter. I thot the 805 was one as well.
Martin says no. I seem to remember differently, but it's been a few years.
Also, if you have two or more
fixture types that need the converter, you need one converter for EACH
fixture type. And the converters only run up to eight fixtures.
As for finding them, good luck. Since the older fixtures are all discontinued for 10+ years, the converters are likely long gone as well.
HOWEVER, you MIGHT have some luck contacting the
Martin distributors in the Philippines. I found a couple old products there, still new in the box. I don't have the info any more, but I'll bet the
Martin site can help you.