I did not believe that I had anything other than the information contained on the Feb 1943 page of the diary.
However, I have found something else including another photo of your uncle - here it is
Heinz Krempel.jpg [ 217.61 KB | Viewed 2675 times ]
This comes from the Duetsches Rotes Kreuz - Suchdienst München Vermisstenbildliste for 1(F)./122 that was passed to me some while ago.
I also have a photo of another crew member
Hans Rollwage.jpg [ 203.47 KB | Viewed 2513 times ]
this is from the same source as is the following which unfortunately does not contain a photo
Hans Bondick.jpg [ 208 KB | Viewed 2675 times ]
The fourth crew member Stfw. Theodor Schäfer (B) is not mentioned on the pages that I have (I also checked the pages for 2 through 5 Staffel just in case.
Hope that the above is a little helpful.
All the best.