A friend of mine has done this. Imported a kit from the US and yes they are pricey but if you can afford it, they are a great modification. With late model flexplates becoming more and more scarce these kits start to look attractive. You don't want o know what I was quoted from a supplier for one of these drive plates. The kits come with pretty much everything you need right down to the high torque mini starter.
You need to make sure if you use this transmission that the TV cable is properly adjusted as it is possible to turn a box to toast in a very short time.
At the end of it you end up with a real sweet driving ride.
Regards