So I got this all sorted. Managed to source a pretty sound driver's seat and very tired passenger seat plus the missing bits for he passenger seat fitment (basically the 2 floor brackets which are available from Butty's Bits/VWH)
Thought I'd share some photos -
A very sad passenger seat, literally had the stuffing knocked out of it...
Good driver's seat but damage to the corner
Which I repaired with a salvaged piece from the passenger seat
I also repaired a broken spring. I used the main part of an electrical connector block and just stripped off the plastic shroud. I made sure to use a steel one (some are brass) that fitted snug and applied threadlock to the screws; you can see it dripping out on the left one.
I retained the original horse/coconut hair pads for the driver seat and bought new for the passenger seat. Under both I attached some composite cloth used for protecting furniture during transit - highly scuff resistant. I did buy the stuff that VWH recommend (apparently new from TMI) but couldn't make this work as I found it too thick and it made the matting (both old and new) stand out proud at the sides.
You can see the difference in thickness here
New coconut pads fitted - NOTE I HIGHLY RECCOMMEND YOU TRY THE FOAM ALTERNATIVE! These replacements are not like the matting in the original pads in that they are completely impregnated with a rubberised binding compound and hence are like sitting on a sheet of MDF. I doubt the springs in the frame even play a part in suspending you in the chair, it's that stiff. The original seat is SO much more comfortable...
I forgot to take photos of the next stage but I covered them both in 5mm batting or wadding - a white candyfloss type of stuffing that comes in a roll. Dirt cheap on fleabay. It helps smooth out the finish especially around the edges. I used a couple of layers on the new seat pad to try and soften the seat (to little avail...). You can see a bit of it in the shots (lower down) of the open back that you have on the passenger seat
Then it was on with the covers. Advice - Trim your nails and use a Bullworker for a couple of weeks prior as this is a bit of a workout.
The slight creasing and lumpiness you can see soon came out after I went over the covers with a hairdryer and smoothed it all. It's also important to make sure that the piping seam faces away from the face of the seat covers so that it is tucked down the sides. Mostly easier to do this from the start of installing the cover but can be sorted afterwards.
Installed the new brackets and put the seat-back receiver back to where it should be for the first time since 1972! Dormobile repositioned it to where the 2 holes above can be seen as part of the cooker installation and seat conversion
So out with the old...
...and in with the new! (well,
new-old... you get the idea)
I like the stock look and now I can fit the cab bunk in
Hope it's useful!