Zen gardens.......tachi-gata plus other bits needed

Not sure where to stick this (be gentle) but need gardening advice!

OK, designing and landscaping garden to incorporate my very own zen garden and place to basically get away from the kids and train in peace! Whilst in Japan last year we took lots of snaps of some beautiful places/gardens/buddhist temples etc We're looking for for some of the pedestal lanterns (tachi-gata), yukimi-gata (the snow viewing ones), water bowls and japanese benches. We can travel anywhere from Essex. Does anyone know of anywhere we can get these bits? Many thanks X