Thanks for all the replies.. I am thinking I will just use the convertable seat now..
Baby Buntings is who has the unity on sale online, we only have 2 stores up here that have the unity, 1 doesn't keep them in stock & would need to order it in & the other I haven't bothered going over to yet as I know I can get it for a better price online.
I don't want to put the baby in the back row, its too far away for my comfort & my idea was having the 8yr old as my extra hands while driving.

*Belle* I ended up getting a toyota Hiace supercustom which is am import.
Might go fiddle now with the seats & see how it goes.