You might try the Kohrs Library located in the city of Deer Lodge, Powell County. Go to the following link and scroll near the bottom for the address:

http://powell.mtgenweb.org/

If they are unable to provide you with the obit, you can try the Butte Public Library, as the Montana Standard, published in Butte, usually publishes obits from Deer Lodge. Again, scroll to the very bottom for the address of the Butte Public Library:

http://silverbow.mtgenweb.org/sbhowto2.htm

Good luck!