Unbelievably, I just finished sewing new door panels for a 1952 MG TD. Yours seems to be a little different design, but if you want some pics how I accomplished it, I would be happy to oblige. Now, I am on to sewing the seats and it is presenting it's own challenges. We lucked out with a leather color that is perfect. So, we're switching from the old vinyl. Of course, that means lots of work.
Anyway, hit me up if you want pics.