Find A Grave shows him buried at Maple Grove Cemetery, Fremont, Newaygo County, Michigan with a death date of March 27, 1961. His plot number is M-06-06a-091-01-1, The last name is spelled Edbrook in Find A Grave. You can order death certificates from the the Newaygo County Clerk Laurel J Breuker
1087 Newell Street PO Box 885
White Cloud MI 49349
Phone: (231) 689-7235 Fax: (231) 689-7241
email: laurie@co.newaygo.mi.us
I believe the cost is $26.00. There are details at the NewaygoCounty.gov web site.

Good luck to you !