Anyone know where I can get some lug nuts that are just like the stock ones with the threads around the outside so the centercap will screw on but a little bit longer. I tried to put my centercaps on my aftermarket rims but the lug nuts are too short and can not thread the black lugs on the center caps on to them.

Grind the little legs off the centercaps that hold them away from the wheel. Then they will fit on aftermarket wheels. Don't grind them more than flush though, or they will be loose and rattle.

I have already grinded the little legs off. They are still short. My rms look very similiar to yours by they way.

I also ground the edge of the 8 bulges where the nuts go through to make it fit tighter.It would have been nicer to just have longer threads on the nuts though like you said.