Yes they did.
Charles Burnett had one, though not from new.
It had the aft deck / cockpit style from the US1-41 as in, 'Lethal Magic' etc.
Dick Strutton also had a later bare hull & deck mk II US1-46 up at his farm, but never got round to rigging it, not sure what happened to that. They had a longer / larger cockpit than the mk1, so the foredeck looked a bit short & stubby - not as pleasing to the eye IMHO.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013