Just keeping you posted, folks. I picked up a set of steel lug nuts by Hunting Horse from Amazon last night (just like these spike lug nuts, but in yellow).
I've read that steel ones are more durable than aluminum. Plus, the paint lasts longer on them.
Anyways, I will give them a try and install them this weekend. If you are interested in how they look on the FJ, just let me know, and I will share pictures here.