Hi. 

I upgraded our bedroom 32 to a 43 over the holidays. The 32" is on a unit which is very similar to this: 

https://www.noelleeming.co.nz/shop/home-entertainment/televisions/television-wall-brackets/omp-m7430-lite-cantilever-tv-wall-mount-small-23-40-vesa-75-100-200-mount/prod124000.html

The existing tv has a standard 100mm x 100mm VESA Mount. 

The New TV uses a 400 x 300mm mounting system.

Manual only gives instructions on how to mount flush on the wall and includes what is required. I can't use this system because of the design of our bedroom. 

Anyone able to link me to a suitable adapter plate from somewhere in Stock in Auckland, or give me some ideas on how I can achieve what I require?