Someone posted about these XV Motorsports ones before. These are the ones I intend to buy when I'm ready to put seat belts in. It says on their web site you need someone to install the top anchor threads if your car isn't equiped. I guess you'd need to have a qualified body shop do that?... maybe someone will come along that has done this already... anyway, here is the link:

XV Motorsports Seat Belts

~Angel