Do you know Rick and Gene Lohrmann of Manning.
If so I can get in contact with them and let them know about your inquiries on the Manning Exchange.
They have Internet access so I would leave it up to them to contact you.

Unfortunately there isn't any Lohrmann information in the Manning Centennial book & Supplemental (or at least that I remember) I have on the Internet.
http://davidkusel.com/centennial/frame.htm

Below are the specific web pages that you can look for Lohrmann information. I know there are some Lohrmanns listed at the links below.
Zion Lutheran Church Records.
Baptisms ---
http://www.davidkusel.com/manning1/zion/frame1.htm

Burials ---
http://www.davidkusel.com/manning1/zion/marriage.htm

Marriages ---
http://pionet.net/~danvogel/marriage.htm

Confirmations ---
http://www.davidkusel.com/manning1/zion/frame2.htm

Confirmation Pictures.
Rick Lohrmann is under the May 17, 1970 link.
I'm not sure if there are other Lohrmanns on this web page.
I would assume there are a couple more but don't know the years.
You'll have to search for yourself.

Here is what I found on Cemetery listings.

Section D
Row 33 North to South

Lohrmann, Erma I 1918 -
Lohrmann, Frenz P. 1913 - 1996
Lohrmann, Clara 1878 - 1982
Lohrmann, Fred P. 1876 - 1965
Lohrmann, Judy Diane 1945 on east side of stone

Section G
Row 6 South to North
Lohrmann, Gene F. 1942 -
Colene K. 1946 -

The Cemetery information above was taken from the Iowa Genealogical Society booklet --- data was collected for the society by Ging Hudson of Manning.

Each section is marked A, B, etc and the rows described above start in the North East corner of that section going north to south and the next row going south to north.
You'll notice the Lutheran church just north of the cemetery and Center street just west of the cemetery.