I have a SFF (Small Form Factor) PC and the height of the PCI slot is not big enough for a full size Graphics card. Does anyone know of a company that can supply these in PCI form. As the case is such a small case there are no abilities for a Riser card either. Any sugestions would be great.

What about a half-height card?... would that work?

You are probably looking for a low-profile card. There are lots of low-profile or half-height cards, but most of them come only with the full size bracket. You need to be sure one you buy has the low-profile bracket already on it or buy a low-profile kit to add on yourself.