I am sure you're an experienced cyclist. Any suspension would change the steering dynamics (often make it slower) and adds weight and extra maintenance.
On a bike like Super Commuter, you could just run the Super Moto at 30psi and have a great ride. The tire has dual layered "Green guard" compound and is fairly puncture resistant. You only need to run higher psi in the rear.
The beauty of SC is the nimble, light feeling that comes with a carbon fork. You not only add weight with a suspension, some of the quick steering effect diminishes. If you don't care about those, there are some suspensions made by Suntour and DT Swiss that could be used but you're looking at ~ $500 upgrade and in my mind it is simply not necessary.
Try Body Float first and you will find that it is more than enough esp when couples with a nice, big tire upfront.