I am looking for some Regent / Imperial "castle" style valve caps for my Sovereign Euphonium. I have some already but I would like some as spares as mine need replating. The bottom caps are star shaped and, water reservoir clip aside, are totally flat. Ideally I would also like the "pyramid" style buttons to go with them. I've tried Windcraft who've not got any, so if anyone could help or advise I'd be very grateful. Thanks!