A slightly more elegant, potentially less simple to apply, and definitely more annoying feature would be to install washers which sit in the larger ID behind where the center caps lock, and weld carriage bolts to the washers. You then get some pan head inside screws (good luck finding those) and use them to install the caps.
The downside is that you probably won't be able to find those inside threaded screws, and the washers with the bolts welded to them would have to be installed/removed in order to keep the OE appearance.
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