Chris--If you look at my pictures, you'll see that I'm misssing the same door as you and also the one above it that you still have! I'm pretty sure we can get Ron Scobie to cast us a reproduction door for the base.If I remember right, Ron also has one of these pumps! I would rally like some photos of the other small access door and measurements for it! I'm going to be satisfied if I can get these covers reproduced as I know I'll never find an original!
As far as your base--it looks like it should come free? Are there any bolts hidden under the dirt? There isn't anything on the inside to hold it down--its just bolts thru the base ring on the outside! If you keep working at it--it will come! Just remember that the thing is cast iron, so take care not to break it as you'll never find another! Finding the external pump might be possible but it ain't gonna happen overnight my friend!
Just to be sure, take a metal detector and check the area for a good distance around the pump, as it may have been removed many years ago and laid to one side and been covered over with dirt from the ages!
