Tim on here, under the name Hamwich, has replaced the wings on his Morgan. I’m sure he’ll be along soon with his excellent knowledge and details of where he purchased them.
I did indeed replace my wings, but I went for glass fibre. I got them from Sid Watson, who I believe has since retired. I have no idea what happened to the moulds. People say that fitting the wings is a very skilled job, but the skill is in being able to get it done in a sensible timeframe. I did it myself and it wasn't particularly difficult, it just took hours and hours of measuring, marking, trimming and test fitting. I was wary of cutting off too much so I did it a smidgeon at a time. As a result it probably took me two full days per wing for the fronts, the rears were dead easy.
If I wanted someone else to do it I'd go to Steve Barnes at Vintage Sheet Metal, he's flipping excellent.