Prevost (pray-vo) Based Motorhomes: These are the motorhomes that look like Greyhound buses with a new cost of $800k to $2 million. Review of these motorhomes are out of the scope of this website (and our budget).
Manufacturers we researched in 2006, now defunct or are no longer making diesel motorhomes.
Airstream, Inc.
Alpha Leisure
King of the Road (Nebraska)
National RV
Rexhall Front End Diesels only
Travel Supreme
Historical list of motorhomes: (most are defunct)