So as I understand it your requirements are
Uniform; British cut in short sleeves. British pattern webbing except for Officer's side arm which is in a canvas thigh holster - style often seen in period 1920-1923 photos. Headgear wasmix of UN blue M1 liners, berets and Swedish caps.
Weapons. Webley revolver, SLR, Carl Gustav SMG, Bren and VickersMMG. Also CG84mm A/T, 60mm & at base 81mm mortar (both Brandt-Stokes).
Hope that helps in your hunt
John