Call Irad and have then copy the record from their microfilm of the Saline County Death Records. They will charge you (not much) for the copies they send you.
Southern Illinois University (SIU)
Illinois Regional Archives Depository
c/o Special Collections
Morris Library – 6632
Southern Illinois University
Carbondale, IL 62901-6632
Hours: Mon.-Fri., 9 a.m.-4 p.m. (except state holidays)