The authors present formulae in the independent-particle model for calculating configurationally averaged electron and electron-positron Bloch momentum densities within the KKR-CPA band theory scheme. In contrast to momentum distributions, these quantities can be decomposed according to angular momentum, so one can study s, p and d electron contributions, separately. In particular, the effect of the positron wavefunction, modulating those contributions in various ways, can be investigated. As an example they evaluate and discuss these quantities for Cu(60)Ni(40) random alloy.