My only guess is they could have died at some point

Or they were separated. the empire only has so many commandos left. I would assume they would spread them out for efficiencies sake. also didn't clone commandos become mentors and teachers for the general imperial army as they have a large amount of experience on warfare.

X0xRevan-RebornX0x Fair point,they did.My theory is that it is like the Bad Batch,where one was loyal to the Empire,and the others are against it.

Now if only Disney had the balls to make a show about it