You can also use Low Energy Electron Diffraction (LEED) to determine the low index crystals that you need. MaTeck Gmbh can supply you with high quality single crystals.
Xray Laue back reflection pattern is also very convenient, quick (few mins) using a CCD camera, it works in air, with no specific preparation of your sample to check your sample crystallographic orientations.
Cu crystals are easily grown using graphite crucibles + CZ