Anisotropic transition metal trichalcogenide material TiS3 is available at 2Dsemiconductors USA. TiS3 is a layered material like MoS2 and other layered systems.
Natural MoS2 is an indirect gap semiconductor (1.2 eV) but becomes highly luminescent in the monolayer from at 1.9 eV (quasi-particle / optical band gap).