Hi Mike
DZUS do a tamper resistant stud which requires a key.
I have alway though that this would be a good idea as unless you are Frankie Chili etc why do you need quick release?
The idea of returning to the car park at Silverstone next weekend to find some S**t has swapped panels is not pleasant one.
They are on page 41 of the DZUS catalogue part number 316 6L 1 XX
(the XX bit is replaced by the length you require) The part number for the key is 306 007 969.
Tel 01252 714422
www.dzus.co.uk Cheers Mike