Honestly when looking at something as critical as lug nuts I'd suggest going with a high quality manufacturer/vendor!!!
Call the wheel manufacturer and get there recommendation, or a solid recommendation from a local tire shop or one of the national chains like Discount Tire Co, that sells and installs a lot of aftermarket wheels.
Lug nuts that "look" like they fit properly can come loose with tragic consequences.
If if you do not purchase directly from source, you can still find a good deal online, but make sure you have the right lug nut for your application.
I highly suggest Gorilla Lug nuts and locks. They likely have a set of spline drive nuts that will work for you.
I hope this helps. No matter what BE SAFE!!!
Also retorque your lug nuts after 50-100 miles of driving any time you change a wheel.