I don't think that Vision sell chemistry. Vanbar have a good selection. Also the big Teds shop in Pitt st & Foto Riesel in Kent St CBD have some chemistry. Teds had a decent range of Ilford last time I was there. also the Blanco Negro lab in Redfern stocks Foma paper & chemistry. Foma paper is good, I haven't tried their chemistry but the Blanco website has a lot of information.