You could go to the LCMS website. They have a list of churchs on it. If there's more than one in the area they could check them all out by visiting.... Just an idea.
Go to the LCMS web page, click on "Directories" , click on "Congregations" and do a search by Zip code. You can set how many miles radius to search in so that it will include suburb towns that may not otherewise be known but are close by.