I recommend metal film resistors here, rather than carbon composition, because they generate less noise. You're dealing with very small voltages and currents, so power rating is not critical - 1/4 W is plenty.

Some cork-sniffer conoiseurs get their panties in a bunch about the tonal properties of various capacitor materials, but that ain't me. You will probably find ceramic caps are easiest to find in that value - good enough. You could try polycarbonate or polystyrene caps if you want, but I doubt very much you will hear any change from one type to another. These different materials do have measurably different characteristics - at Radio Frequencies. For audio use, no difference.