Peugeot Repair Questions? Ask a Mechanic for Answers ASAP
Hopefully i can help..
Unless you can get smack an old slightly down size socket over the the security bolt without damaging the area around the bolt recessed in on the alloy.that's one way - or there are some cheap locking wheel nut removal extraction sockets out there - that in a sense is a left handed threaded socket which grips the head of the security bolt so you able to remove them.but obviously can't be re-installed since the security key is as you say broken.unless you have a spare wheel bolt to put in place until you can find another locking wheel nut security set..
If another key needs to be purchased with that code then im afraid that's usually always direct from the dealer for that as those pins are placed on the key in such a way that it only fits your car/security bolts...
Another alternative is to maybe just opt to have your slow punctured repaired at the same time the tyre centre or garage will or should have an extraction set to get that out..I do hope this helps