Replacing a Atwood power center, recommendations

I looked up the model and it states that it is a power center / converter. I found that the Parallax 7355 is a same-size replacement. I have the dimensions but I guess I will need to keep looking. What are some reputable brands? The electrician who looked at it said I need the whole unit. Take a look at the picture. I hope their is enough of a service loop in the romex to be able to trim back all the burned wire.

https://drive.google.com/file/d/0B43aZ61IgPWwSGp1dGJpejR2azA/edit?usp=sharing