Instrument cluster swapout help

[Mareo]

Hi All, I think this post might be really helpful for me.

I need to convert my European Yaris MK2 to the UK specifications: this means (unfortunately ) that I need to replace my actual speedometer. Its number is 83800-0D660-D, for a 1.0l petrol 3dr 2007 Yaris with manual transmission.
I've checked for second hand UK speedometers and there are different types both digital (numbers 83800-0D650D or *0D650 or *0D490D or *0D680D) and analogic (mainly 83800-0DG60).
In any case I need to extend the cable to fit the new connections but I'm really afraid that the single pins will not correspond similarly between the European and the UK speedometers.
Then my main concerns/questions are:
- which is the best part number that matches with my 0D660-D, or do I need to match the same engine displacement, doors, gearbox?
- Is there any pin wiring conversion I need to consider when cabling the new speedometer?
- If I buy a new digital UK speedometer it will display the speed pointing toward the right seat, while my car is left-hand drive. Is it possible to use my LHD speedometer framework (I've already disassembled my actual one and there is a mirror inside)? If not, is it possible to buy an analogic speedometer without any problem in the wiring connection (i.e. different pin locations and cabling)?

Thanks in advance for your help,
Matteo