Yep, Im looking for that and the part to which you can mount the N800 - or any alternative holder there might be.

At this moment I do not have any part of the N800 holder as the Nokia here in Finland does not sell that or any part of that. Or actually Im not 100% sure whether they sell that thing which goes to the car wind shield but in any case that does not help much as they are definetly not selling the actual N800 -mount that goes into the wind shield part. Ive checked the situation with the Nokia Flag Ship Store and they said that no can do. Not even as spare part sales.

I actually referred to the same page you did when I was looking for the holder parts here in Finland by emailing various suppliers and to my query all the local suppliers said that youll just have to buy the Navicore kit in order to get the holder (i.e. the 2 parts). Sad but true, as one famous song says

Now Ill just have to see what comes out of the negotiations with this one store who - apparently - imports from Sweden. As said before, they were of the opinion that the holder they have is N800 compatible and it did look like it would be... lets see.