hi acwats,
you can fit them in your car in half a day and have them as good as factory fitted. you would not of had them fitted by the factory as if you had you would have a couple of cuts in the rear parcel shelf.
1, remove teh rear parcel shelf ( 2 screws behind the seats and two more that hold the clips/straps for the rear seat back rests.
2, once you have removed this there will be some thick sound padding, on the front of each corner you will be able to see where you need to pull/ cut out some of it in order to fit the seat belt rolls. there should be 2 bolt holes already in the body work that you screw the belt body to.
3, you then need to mark thr rear parcel shelf each side for the belts to come through. what you want to get is a couple of guides. best thing to use is, where the front seat belts come up and out of the panel they come through a plastic guide about 3.5inc longx 1ich wide, i'm sure you know what i mean.
once you have these, mark the parcel shelf a couple of incs down from the top and a couple incs in and cut to the shape of the guides, screw them in useing small self tapper (black better).
pass the belts through and replace shelf, once you make sure they don't snag on any thing.
finish of by fitting the buckle and the side mount.
i did this to mine 9 years ago and its what you would get if factory fitted. except the rear guides, which are similar seem impossibe to get. when i did mine i got the belts secound hand, can't remember where a long time ago (but are porsche) and charles ivey for the guides, it was iveys that told me to use these guides as that is what there would use.
just looked at my photos but don't have any of my rear belts fitted. if you can wait untill weekend i can take some and post them up.
doing it this way is harder then the way on the web site of the other post made by malcolm, but it is very neat and you don't spoil the top of the parcel shelf.
steve