any ideas if the climate ac unit 5j0907044 will fit my 2014 monte

Do you currently have a climate unit or the manual ac/heater?

manual 

No chance.  Unless you want to change huge amounts of other stuff behind the dashboard (and pay a small fortune to do so).

People have asked this before, and the answer is, its a massive job which really isnt worth doing

This video shows manual AC to Climatronic upgrade in a mk6 Golf.

 

The amount of car you'll have to pull apart and change will be about the same in the Fabia.

 

Shiz the bed, that's got the potential to turn into rattle city in that car

All done in 5 minutes 6 seconds though.

Impressive.