I've been noticing a raft of crappy bumper caps out in the market, from eBay sellers and also some established parts shops. It's like I have to get the seller to take a pic of the exact caps I am to buy.
Here's an example of one on eBay. Notice for the screw holes are not properly aligned with the star points? I've also noticed this on Bally Playboy caps as well, an item I am looking to get. The NOS ones all seem to be properly manufactured.