To make the numbers, use publisher, make the number fit an A4 page, then reverse it and print it out. Cut these nubers out and use them as a template on the paper side of some black sticky back plastic. Cheap and good looking numbers for a few pence. Then stick onto fascia board, suitabley shaped, drill a few holes and secure with cable ties. Turn the protruding edges of the cable ties inwards to pass scrutinering and there you go.