I was mistaken on what you had on the front, thought it was that type in the picture, lol. And no worries on the info, just figured I'd bug you whenever time came to cross that bridge. The priority list before caps is a long one.
Think part of it, is just the old school in me that doesn't like plastic bits on my wheels. And I drive through brush/fields/trails too, etc.
There is a domed version of those, but I'm sure you know already.
What I think would look sick, is if someone made caps with a retainer ring that went under the lugs, and had raised portions between the lugs to hold screws around the edge of the cap, like the spider caps for smaller wheels. Or just drill and tap the wheel for some short screws.
Could be done with actual different styled caps, and with or without the lug covers. Plus with a retainer ring it would keep the lugs from marking the wheels.
I don't see myself making them, so I'll shut up with my babbling.