We carry SOME molding clips, however not all chrome trim will come with fasteners or clips. Generally it’s assumed you’ll reuse your old fasteners or obtain new ones locally when the trim or emblems come without attaching hardware.
Sources for the clips & fasteners are:
Most of these companys only sell to shops, so you’ll have to go to a body supply shop (where you buy auto paint) or a full service autoparts store to obtain the clips. Take an old clip with you to match up against the manufacturers catalog to obtain the right clip. If you don’t have an old clip – the Fisher Body service manual shows what style clips are used on which pieces of molding.