[Wannier] Wannier functions on arbitrary grid?

[Tom Berlijn]

Dear developers of Wannier90,

I would like to plot Wannier functions on an arbitrary grid defined in 
terms of number of grid points, origin, and 3 vectors.
If I understood correctly this is not possible in the current version of 
wannier90.
Would anyone be able to give advice on how the source code(s) would need 
to be modified for this purpose?

Thanks, Tom