Hi Antun. The co-ordinates are recorded here ( Mljet Is. near Dubrovnik).....
https://allspitfirepilots.org/pilots/1086
You could contact Tinus le Roux on this excellent SAAF site......
https://biltongbru.wixsite.com/ww2-s...ed-to-the-site
You have probably looked at the 4 Sqn. ORB which says (for the 14th) a subsequent search "by 2 of our aircraft yielded no results" ( presumably by 4 Sqn.).
Nick