I've got some brand of splined lug nuts (Muteki?) for my Enkei track wheels. I recently got a cordless impact wrench (wish I'd bought one years ago!) but I have to use the splined lugnut key with a standard socket and it is a little awkward at times.

Does anyone know if you can buy a splined lugnut key to fit on a 1/2" impact wrench?

I'll probably switch to hex lug nuts when I get some ARP lug bolts but until them I'm stuck with the splined.

I suppose I could weld the splined key to the impact socket but 1) that wastes an otherwise useful impact socket and 2) makes it so my lug key can't be used with a t-bar lug wrench.