It's always cool to see pictures of these trucks in other parts of the world, thanks for sharing.
Truck looks great by the way.
I wonder if a set of the factory black six lug GM center caps and lug covers would fit your current wheels? You'd have to switch to the factory style lug nuts with the external threads for the lug cover to grab, but it looks like they might clear.
For reference, I'm talking about these center caps. GM part number 15635474. They come without emblems new as you can see, but you could have a local sign company print you up something in whatever color or design you want.
You must be registered for see images attach
EDIT - Forgot to mention... The factory lug nuts that go with those are GM part number 09595175, and the lug nut covers are part number 15646250.
DOUBLE EDIT - Those center caps also came in chrome, but I figured that might clash a little with everything else on the truck being blacked out. The chrome caps are part number 15634850.