When I visited the Ardingly show, I saw a Ruston IP fitted with a Crossley cast cube exhaust box, doing a fine job. Next door was a Crossley with a similar but bigger box and the owner said it was relatively recent repro from somebody in Congleton, but he didn't have any details available.
Does anybody know if this is correct ie can somebody still supply repro cast Crossley boxes? - I'd love one for my PH1060.