The only pattern I can think of off the top of my head is this one.
You'd still have to modify the collar and sleeves, though. Sleeves would be easy. Just extend them. The collar you would have to play with. Perhaps you can find a pattern with that collar and use that collar.
It also has more seams then you would need. If you want less seams but the same look, make a mock-up and then just rip the seams you want to keep and use that as your new pattern (keeping the other seams intact). Yes, it would take more time but I always think making a mock-up is worth it. You don't want to use your good fabric and realize that the pattern isn't working the way you would like it to.