lists the parts you need for the front couch in the parts area, but as mentioned, you will be creating a lot of other issues when you take out the two walls involved as well as the loo.
That said, the front "BED" is a child size bed that is only about 22" wide.
From my own observations as a former 13' Scamp
owner, I think that 13's without front bath outnumber those so equipped by at least 5:1
And while some don't seem to care, those kind of modifications can have a negative impact on resale value.
Now, you could just buy the 13' Lil Bigfoot
I have for sale and not have to worry about it.