2010 Mazda5 2.0 petrol Gearbox replacement
 

Hi guys in need of some help here.....
I have a 2010 2.0 petrol Mazda5 furano with a 6 speed manual gearbox its the mk1 not the mk2.
a few weeks ago whilst driving home down the motorway 6th gear decided to be non existent.
So im pretty sure im going to need a new box, and heres the problem i cant find a 6 speed gearbox anywhere...... Does anyone know what cars used the same gearbox as the Mazda5, as i have looked and cant find the answer.
Here's hoping someone here knows the answer to my predicament.

Thanks in advance