How about replacing the RRs with Hueycobra-style Quad TOWs, with armoured shields around them?
What about simply replacing the RRs with TOW tones on a one for one basis rather then the quad packs?
For such a small vehicle it might be practical to consider a single launcher system such as that used on the early M274 Mule, M113, M151 MUTT, and eventually the HMMWV. At least there would be enough space for several missile containers plus the crew and fire control electronics.
That concept could be easily modeled considering the plethora of HMMWV and M151 MUTT kits that came with the TOW parts for the missile armed versions.