Since the guy who did Conversions of Federation and Klingon ships almost two decades ago on this forum didn't do Romulan ships, here are SRM ships converted to ICON:
Class and Type: M-4 Wings of Justice-Class Assault Ship
Commissioning Date: 2266
Hull Characteristics
Size: 4
Resistance: 3
Structural Points: 80
Operations Characteristics
Crew/Troops/Evac: 84/1800/9500 [8 Power/Round]
Computers: 3 [2 Power/Round]
Transporters: 8 Personnel, 8 Assault, 4 Cargo [10 Power/Round]
Tractor Beams: 1 av, 1 fv [2 Pwr/Rtg/Rnd]
Engines and Power Data
Warp System: 5.0/7.0/9.0 (4 hours) [2/Warp Factor]
Impulse System: .5c/.75c [5/7 Power/Round]
Power: 125
Sensor Data
Long-Range Sensors: +1/12 ly [6 Power/Round]
Lateral Sensors: +1/1 ly [4 Power/Round]
Navigational Sensors: +1 [5 Power/Round]
Sensor Skill: 3
Weapons Characteristics
Type G Disruptor
Range: 10/30,000/100,000/300,000
Arc: Port and Starboard (480 degrees)
Accuracy: 5/6/8/11
Damage: 9
Power: [9]
Weapon Skill: 3
Defensive Characteristics
Type Deflector Shield
Protection: 12/16
Power: [12]