On eBay Hans Grund. In Career Summaries - Luftwaffe Officers 1935 - 1945
Section L - R there are 2. but only 1 might be him with little info. Mentioned in death announcement is:
MÜLLER-ROHRMOSER, Fritz. (DOB: 11.04.09). 01.08.42 promo to Maj.(Ln.). 10.04.43 Maj. and
Kdr. Ausb.Abt. z.b.V./Ln.-Schule Halle, appt Kdr. I./Ln.-Rgt. 14. (n.d.) Maj., Kdr., 1. Lw.-Ausb.Div.
available for assignment. †11.11.89. Buried at Fürstenfeldbruck/Bayern.
So perhaps a bit of extra info.
see
I sent several mails with other findings but to no avail to
Luftoffzfeedback@shaw.ca
https://www.ebay.de/itm/356733791796...Bk9SR9KgrbK_ZQ