Longer Locking Wheel Nuts?

[_GRP_]

So, going to be fitting some different Audi wheels to my car soon.
I'm lead to believe standard Audi wheel bolts are:

Thread Size: M14 x 1.5
Radius Head
27mm Length

Going to be using 7mm spacers, so I'm assuming I need 34mm -ish bolts.
I can find longer length bolts OK, but not locking bolts.. any ideas?

 

[Gazwould]

Locking bolts are a swear word..

 

[_GRP_]

Locking bolts are a swear word..

why's that buddy, really don't fancy having my wheels pinched.