I did my own when I did my 1928 RR I also used a sewing machine as the stitching was an important part, and used West of England headlining once you get under way its not too bad. , but not for the light hearted.
300-24, saloon and coupe, E300 24 valve diesel estate
As Malcolm says, not for the light hearted. It would be best if you contacted a coach trimmer who are used to this sort of repair. I would (so the answer is no before you ask )
Unless you are really confident about doing a first class job, then don't do it. Why not pay an expert and hover in the background to watch and learn? a skilled job that MUST look right.