We need a temporary fix so that we can have a shower while we do up the main bathroom. There is a tiny downstairs loo where we could in theory rig up an enclosed shower until the work is finished . The picture is the sort of thing we need but is 700 x 700 x 2020mm and the doorway is just less than 700 and the ceiling just lower than 2020. We need something slightly smaller and if possible ( and it probably isn’t) flat packed AND not too expensive . Any ideas??