Vicki, I am only a hobbyist, not an expert, but I'll offer this until you find more informed aid.
Your post said, "...since his military records were lost in a fire...". Does that mean you contacted NPRC and were informed that his records were lost in the 1973 fire?
If he ever applied for benefits, you can contact the Dept of Veterans Affairs to see if they have info that could help you. The national number is 1-800-827-1000. Also, you may have a "nearest DVA regional office" in your area. The VA web address, with other info, plus a list of facilities, is http://www.va.govhttp://www.va.gov
Check for a recorded discharge at the county courthouse where he resided at the time of he left the military. It was not unusual for WWII vets to record their discharges.
Other possible sources include: 1. Veteran's organizations (e.g. American Legion) of which he may have been a member at his place of residence after the war. 2. State Historical Records Office (of state where vet resided at time of entry into service). Ask them to check service record cards, bonus records, and Reports of Separation that the state may maintain. Internet listing of state historical record coordinators: http://www.archives.gov/nhprc/about/state-coordinators-boards.htmlhttp://www.archives.gov/nhprc/about/state-coordinators-boards.html 3. U.S. Civil Service Commission, Bureau of Retirement and Insurance (if retired from federal employment) 4. Any employer to whom a record of military service was furnished. 5. State Adjutants General (if any service was performed in the National Guard). 6. Social Security Administration (if a claim for old age, survivor's, or disability insurance benefits has been filed and the service involved was from 7 Sept 39 to the present). 7. Railroad Retirement Board (if a claim for railroad retirement or survivor's benefits was filed). 8. Hometown newspaper archives which might have stories about his service or homecoming.
Also, take a look at the site members.aol.com/dadswar/index.htm
Some of these are resources I have used researching my own family, others are those I have only read about, or found online. Please verify all to your own satisfaction, or seek professional assistance.