As many have already mentioned in this forum, fit the door to what you already have, then install the panels to fit the door. This will involve some creative thinking and removing and reinstalling the door several times, but when you’re done, the door will fit the opening.
Many thanks Phil, yes I do understand the door fitment is absolutely critical.
This is more about sill placement fore and aft. The A pillar was braced in position at the start several years ago and I will be refitting the door before any welding takes place.
Paul