door help

I fitted a door from a 1984 defender to my 90 today, I am a bit confused as to which striker/catch i need to get as the old one from the push handle doors is different. I have searched but can't quite work out which one i need

here is the new door latch


the old catch


oh and just to be sure, is this colour Arles/windjammer blue, before i buy the paint to do the door?


cheers