i would have thought there was only one type of factory mudflap...if so i ditched mine when i got the car as they had rusted as most of them do...
Now there's a thing... I always thought there was only 1 type as well... but...
When I was selling the Grey Ghost (God I miss her

) I went to put on the ones that Krittas thru at me with the Mighty GQ.
They didn't fit

I had 1 dodgy original one left from the 'Ghost and the metal bottom bit that rusts out and the profile of the stiffener wasn't the same when I compared 'em ... or rather what was left of 'em
Go figure