Leighton alloys have an unusual sizing (68m, so OEM VW centre caps, including the self-levelling jobbies won't fit). I got some of these for my LV-1's...
4 items 68mm / 62mm VW wheel center hub caps VOLKSWAGEN
They come from Germany, but didn't take too long to arrive from memory.
Simple to fit, just drill a hole in the existing Leighton caps, hook an allen key through and yank 'em off, then press the new ones into place
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