To change to cavity doors you will need to remove the wall each side of the doors to accommodate the cavity housing. Normal sliding doors would make a difference but the problem with them is they never stay totally closed and they do become quite noisy and annoying. This problem also applies to double cavity doors. The other option is to use bi-fold doors, they won't intrude into the room as much. Do you really need two doors there at all and is the glass above the doorway necessary? My personal preference would be to fill it all in and just have the one door to the room. You could even re-use one of your doors.

It would not look odd and is quite common. I've sold many robes over the years that had shaker-profiled sliding doors. I would highly recommend a heavy duty track like the "Indaux" system Nover sells and use 18mm doors.

I've been trying to find a door supplier that can provide a specific door and have had no luck. Details are: New residential home build Brisbane Aluminium pivot enrty door 3 or 4 x vertical glass panels 2400 x 1500 or 2400 x 1600 TIA

Actually I think you can have whatever style cabinetry you want so long as the colour scheme is the same, consistant colours are what helps create the 'seamless flow' from old to new. We did the same kind of renovation 2 years ago - a huge extension onto our 1900's cottage and the front hallway (in the original house) joins the new hallway so flow was very important as we did not want it to look like the old house stopped and the new house began. But honestly the cabinetry can be more modern if you prefer, and completely different from your existing, as from my experience to create the perfect flow between the old and the new the most important details are: 1) Paint and colour scheme: If you want the old house to connect well with the new extension make sure you repaint the walls, ceilings and cabinetry in the original part (at least the hallway and areas that connect with the new) the same colour as you paint in the new extension and keep the colour scheme very similar between the old and new. 2) Flooring: We had solid hardwood flooring in the original house but unfortunately is was so badly water damaged and patched throughout so couldnt be saved, so we installed the same wide-panel reclaimed-look oak flooring that we were using in the extension - essential as the old and new hallways joined. 3) Doors: Try and find doors as close as possible to the ones you already have. We had some difficulty with this as ours were solid timber and had 5 horizontal panels but in the end we managed to find one supplier that had similar and with so many doors in the new extension it really helps create a more seamless look 4) Wall panelling (if applicable): We had waist high panelling throughout the original house and our builder copied this throughout the extension (his suggestion). Couldnt be happier with the result and it definately wouldnt have looked right if the panelling stopped suddenly where the new house began 5) Consistant ceiling height: Really important when blending old with new, make sure you keep ceiling heights the same at the point where the old meets the new - or go much higher, this also works. But dont go just slightly higher or lower! Other than that there is no need to try and replicate other period details like cabinetry and cornices. Love and celebrate the original part of your home that has the quirks, ornate ceilings, fireplaces etc and let the new extension compliment without trying to compete