I also considered expensive OEM badges - if I could find them - but realised it would only be a matter of time before they went all crappy too 'cos they'd presumably still be the same flawed design.
So I used the ebay stick-on ones - nice 'n' easy & look great.
Just make sure the old cap underneath is really clean first and apply them really carefully (bang in the middle) 'cos once they're stuck, they're stuck!
On closer inspection they're not quite up to the original spec. but they do the job very nicely.
Got them on the SRT and PT Cruiser - they've been on about 9 and 4 months respectively - will see what a full winter does to them - but so far, so good.