The latest fly porshce racing has a magnet in it - must have strengthened the chassis to cope with the downforce.
If you are based in Euroupe then if you wait a few days they should be in your favourite shop. If not Euro based or you can't just wait, I've bought from sphobbies.com and criccrac.com and had no problems with either of them. Note p&p can be quite steep from Spain.
Matt