Wow, that's quite a differemce
Graphically shows it. Yours on the right are identical to the ones off my R50 02/2002 Coop.
The parts system shows they changed in 07/2004, and the one on the left is the part number they quote as the facelift part.
07 Cover, pipe left decor silver 1 07/2004 51456973073 $44.56 +core
07 Cover, pipe right decor silver 1 07/2004 51456973074 $44.56
The pre-07/2004 parts are no longer showing in the parts system??? Looks like they'd need mods to make them fit.