M4 Nylock LOW PROFILE Wheel Nuts

[Kao]

Good Morning! I was wondering if you guys could help me..

I'm looking for some low profile Nylock M4 wheel nuts for my Tamiya TRF511, I'm have a couple of problems with the wheels erm.. falling off

As far as I can tell, it's due to the length of the thread on the front wheels not being long enough to go through the Nylock on a normal size wheel nut.

I've been trawling the interwebs but I can't seem to find any.. anyone got any ideas?