Whatever Marauder II Cs, Marauder IIC and Marauder II are available . . . nothing says you cannot have a PC visit Irian . . . I mean, the -6S is a pretty solid machine. Interesting enough, while production started in late (Fall?) Nov 3133 and the world kept distant from Oriente and the neoFWL for a while the -6S is not on FWL or FWL State RATs though things like the Juliano are on the RATs. And by TP Irian, that thing was being churned out pretty steadily . . . makes their planetary militia when independent have some kick, and should have been able to trade for top notch faster designs.
FM3145 only has the MAD-6D on the Republic list, twice . . . not as nice a design as the -6S. Great for orbital drops to secure a LZ, but . . .