Dear Jim:
So glad that we could help you. You'll find a great group of people here and I'm happy to report that many of them will take time out of their busy schedules to jump in and help one another. I've had many folks tell me that they've posted other places too and have never recieved any responses. One gentleman told me he and his dad had been searching for almost three years and until they came here, they were just running around in circles. They've found out more in two weeks time and were placed in contact with others after trying in vain for months on end. That is good news indeed!
Please let me know when you hear from Al, Russ or Jim of the 45th Inf Div. They are all great gentleman and all a wealth of information on their unit. 
You will want to contact your local Veterans Admin. Actually the Admin of the state that your mom received benefits from. They DO have the records. That is how I retrieved my dad's records, because his too were burnt in the fire of 73. Let me know how that goes. I received his records within 2 1/2 weeks of contacting them. 
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"