Swivel bases for single/double seats in 2020 Transit in Australia

I am starting to fit out my new Transit mid roof van, and am trying to source swivel adapters for the drivers (single seat) and passenger (double seat) in Australia.
I have sourced a double seat adapter from Custom Design in England, but wondered if anyone knew of an adapter I could source for this van (2020 350L Transit) from Australia - the shipping is very expensive from England.

Doesn’t look like anyone here has an answer. You might want to try the folks at Expedition Portal - might be more Aussies there who can answer your question.