It looks like my DE-541.
PPL motorhomes used to have parts. Click on their online catalog then on left side select refrigerators, find Norcold marine then look for model numbers. Been awhile since I looked for parts so may not have all steps but should give an idea on how to search.
1995 E250 2x SMB White Contempo Top Custom SMB Interior 5.8L (351) 69K miles
Added Propane Tank & Propex HS2800/20 Gal Fresh inside/20 gal gray underneath behind axle
2.8K Onan/Porti Potti Shower Area/110V Digital Oil filled Electric Radiator Heater/Dynaglo for backup
Hankook Dynapro ATs 225/75-16 LRE
New to me 10/2008 - 2nd owner