Gloria002,
Nothing is impossible if you got the cash
. If removing the love seat and building a new cabinet is a project your DH does not want to do there are several companies that will do exactly what you need. I had an overhead 26" heavy CRT TV in a head knocker cabinet. I found a perfect fit 32" LCD that would replace the 26" CRT in the current cabinet. But, this still did nothing for reducing the length of the overhead cabinet. I called Classic Coach Works in Florida and asked what cost I would be looking at if they redid the overhead cabinet and a new 32" LCD. A ball park figure was $4000.00 for the complete renovation
You are looking at $125.00 per hour for cabinet maker time to design, build and stain the unit plus installation cost to remove old and install new plus fixing ceiling, trim and what else to make it look professional. My solution was easy, I bought the 32" LCD for around $500 that fit my existing cabinet and watch my step as I enter the motohome like I currently do.
Good luck with your project.