dannytas wrote:
We are currently looking for an A class, but with the lower doors it sure limits what we can get.

Before I'd compromise on the height of a MH, I would remove the concrete on the right side from the road to 15' inside the right bay. Replace with a flat pour till inside the garage 5' and then ramp back up in the last 10'. This will probably give you 12" or more additional clearance on the front of a new MH and a little less in the middle. Add a manually folding section to the bottom of the door to fill in. The back axle may not get to the original floor level. Not sure this would work if you have to back into the garage.
Another option would be to replace the roll up door with two taller doors that swing open, but it would be hard to make them match the looks of the other roll up door.