Hello @Karen_De_Paep 
Welcome to the Creality Forum…! 
Unfortunately I’m not sure what the pitch (distance between pins) is of that JST connector used in your printer as Creality uses both. What is the model printer you have and maybe someone will recognize the size. You could start by searching Amazon for:
JST XH 2.54mm 3 Pin connectors like these:
or smaller pitch like the JST 1.25mm 3Pin Mini Micro:
Creality k2 plus, this is the connectors but item delivery not in Belgium 
Creality K2 Plus filament- en snijsensorkabel (3103090095) – Vervangingsonderdeel | RS3D Printing
unfortunately I could not get this part shipped to me in the US either… unless they send me one, no way I’m paying for them to ship it from China for $30+ USD
according to my recent ticket from Creality… China. Honestly though I found better deals from DigiKey. these 3x parts:
SUHR-03V-S-B - the connector housing
ASSUHSSUH28W203 - jumper SSUH-003-p0.15x2 - these are the wires pre-crimped(they have different sizes from 2” to 12”)
SM03B-SURS-TF - replacement for the connector on the filament cutter pcb itself if you like to solder
found this a while ago for most of the toolhead connections:
JST-GH 1.25mm - I got a kit of these from Amazon, but just need the 3-pin JST-GH 1.25 to plug into the toolhead.
If you are by chance still looking for this cable. Creality K2 Cutter Detection Cable Replacement | USA Made – Wacky McLovin Prints
They have the harness made to order.