Rear view camera Fabia mk II

HI iv had a good look around the forums but cant quite find what i'm looking for, i have a vrs mk2 fabia with amunsden+ headunit and i want to fit a "rvc". 

Problems i have

1: not sure what type camera i need ie RBG etc

2: havn't ever seen one on the fabia mk2

3: which ones fit the Amunsden+ without needing a silly converter ?

iv seen a few built into the tailgate switch on the yeti for example is the switch the same on the fabia mk2?

any help in the right direction would be great like what the correct camera is for the amunsden+ and were i can get one at a reasonable price.

yes the fabia isn't a very big car either for parking its just were i park there is low bollards that cannot be seen when reversing and i don't like the silly round circles of parking sensors

thanks