According to the information gathered, this patch was created for/at the request of a colleague of the Menin police (PZ Grensleie).
Unfortunately, the people contacted in this area are not able to confirm this information.
What we can be sure of is that the inscription "POLITIE" indicates that it's for a Dutch speaking colleague/Dutch unit that the patch was created.
If you have any concrete information about this patch, please do not hesitate to contact me.