Someone posted it on another forum, I simply searched for "WMBN Island View Hill, MI." Guessing their info came from the same source (FCC). 45°35'09.0"N 85°04'26.0"WI was only able to find the coordinates from an FCC comment on the application found in the period between History Cards and CDBS complete applications. I found that on fccdata.org. Where did you find it?
Here's what I found.