Locking wheelnuts

[boomboompow]

Evening all; the locking nut on one of the front wheels of my '05 Aero has burred and I'll need to replace it (once I find a way to get the bloody thing off). I'll cross that bridge when I come to it, but obviously I'll need new nuts to replace all four lockers (the other 3 come off fine).

My question is will a set of off-the-shelf locking nuts fit my wheels (they're the standard 5-double spoke Aero wheels) or do I need to get a set of Saab locking nuts? My memory is hazy but IIRC the last time I had to do this with another car I had to get manufacturer-approved nuts because the design of the nut hole was unique to the car, and off the shelf nuts wouldn't have fitted - is that going to be the same here?

TIA