How about:
LUVW, LSVW & MLVW replaced by Eagle V or Navistar MXT known as the Light Support Vehicle System (LSVS) with basic, weapons carrier, ambulance, command post, cargo, MP and SEV variants
MLVW & HLVW replaced by HEMTT 8x8 (10-tonne) being offered for the MSVS in cargo, PLS & fuel/water tanker versions known as the MSVS
HLVW PLS, tractor & wrecker replaced by the Oshkosh LVSR 10x10 (16-tonne) PLS, tractor and wrecker known as the Heavy Support Vehicle System (HSVS)
This would give two basic vehicle systems to replace four current systems (HEMTT & LVSR are based on the same vehicle). The commonality of parts would be cheaper to operate.
General Dynamics Eagle V: http://www.gdels.com/brochures/eagle6x6.pdf
Navistar Defence MXT: http://www.navistardefense.com/NavistarDefense/vehicles
Oshkosh HEMTT 8x8: http://www.oshkoshdefense.com/products/13/hemtt-a4
Oshkosh LVRS: http://www.oshkoshdefense.com/products/16/lvsr