Your search for "kanban ho" revealed the following:

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Whistle Stopper : Prizer - Finished product HO(1:87) 28003

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Queen Post Height 1.8mm : Grant Line Unpainted Kit HO(1:87) 5050

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Standing carrier and large bogie: Preiser, complete painted HO(1:87) 28125

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Double Doors 18type 39.5 x 20.5mm 1 Set (4 pieces) : Classic Story Unpainted Kit HO (1:87) PAS-0007-18