Laravel.io
#!/bin/bash
AMSTERDAM=$(curl -s -L https://reserve.cdn-apple.com/NL/nl_NL/reserve/iPhone/availability.json | /usr/local/bin/jq '.["R408"]."MN4M2ZD/A"' -r)
HAARLEM=$(curl -s -L https://reserve.cdn-apple.com/NL/nl_NL/reserve/iPhone/availability.json | /usr/local/bin/jq '.["R540"]."MN4M2ZD/A"' -r)
DENHAAG=$(curl -s -L https://reserve.cdn-apple.com/NL/nl_NL/reserve/iPhone/availability.json | /usr/local/bin/jq '.["R539"]."MN4M2ZD/A"' -r)

URL="https://reserve-nl.apple.com/NL/nl_NL/reserve/iPhone?partNumber=MN4M2ZD%2FA&channel=&rv=&path=&sourceID=&iPP=false&appleCare=&iUID=&iuToken=&carrier=&store=shopid"

if [ $AMSTERDAM != "NONE" ] || [ $HAARLEM != "NONE" ] || [ $DENHAAG != "NONE" ]; then
	echo "AVAILABLE | color=#00ff00"
else
	echo "NOT AVAILABLE | color=#ff0000"
fi	

echo "Amsterdam: $AMSTERDAM | href=${URL/shopid/R408}"
echo "Haarlem: $HAARLEM | href=${URL/shopid/R540}"
echo "Den Haag: $DENHAAG | href=${URL/shopid/R539}"

Please note that all pasted data is publicly available.