MT75 Part Numbers

[Kong]

Hi guys

I have a high mileage MK4 mondeo 2.0 petrol 5 speed manual and I'm having various problems with the gearbox. Thinking it might be easier and cheaper to replace it rather than fix. Does anyone know if the equivalent gearbox on the MK3 has the same part number or if it would fit? A MK3 box from a breakers cost's next to nothing!

Thank you