Tom,
Actually they were something the PO added, and I have no idea where he got them from. They are in fact thin machined aluminum plates (on the typical carpet wear spots) that are screwed in. I kindda like the look so I'm going to keep them...that and the fact that I've never seen them before either. Like I said earlier I have some other mods to the interior that I haven't gotten around to taking pics of.
I'm in the process of buying a place that has a single garage (thank god) so I'll have all sorts of garage and car pics in the future
Nathan