For the Indians that fought on the Western Foint 1914/15 I can use Great War Indians obviously, but what about the Gurkhas?  Perhaps dismounted Anzac cavalry

Yes, that would be your best bet for Western Front uniforms. The dismounted Anzac cavalry have long sleeves and trousers, though the latter are partially covered by the high riding boots. Shouldn't be a problem given the scale. The emu plume will have to be removed from the slouch hats but it won't be too difficult.

It will be difficult to remove the over-the-shoulder ammo bandoliers but you could probably get away with just painting over these in the same colour as the uniform.

Robert

Thanks Robert. I've taken a very close up look at the Anzac figures. Didn't realise they had the sculpted plumes. Shouldn't be a problem as there won't be that many bases to represent the Gurkhas. Have now seen the bandoliers as well. Can't have too much ammunition I suppose.