Locking Wheel Nut Key (Chapel-en-le-Frith SK23)

I need a key for a wheel lock nut. I really only need for 10 minutes it to loosen one wheel nut. I can then gift it right back. It is a 9 point star pattern as in the picture. Key Code 186. It is quite common and often used on older Vauxhall Vectra, Signum and Astra.
Thanks