Hi guys,
For those who are interested This is an update.
Like i said, I purchased all the bits and pieces TRD468 mentioned from JayCar.
Assembled the unit together, added an RCA female input on the box and it looks like this.
You'll need an RCA connector for the iphone. It will simply plug in to the RCA connector i added previously.
Then i forgot TRD468 said the headunit input is NTSC so i had to purchase one of these PAL to NTSC converters.
And finally. It was done.
So happy with the outcome.
This would not of been possible without TRD468 information so, Thanks again TRD468!