[Carl n Susan]

I know Simonsrf (Robbie) installed a Dimplex he bought from Lowe's into that same area on his 29nn style rig. He did have to alter the opening a bit, but he was able to do it with the limited tools he has on-board (they are full-timers) and the trim covered everything.

You can PM Robbie (or check his (and Don's) installation at Quartzite) and I am sure he can provide more details. If the Search function was working you could find postings of others who have installed the Dimplex in rigs with the front entertainment center area of the 29nn/30nn series rigs.