Thanks frank and i found my lock assembly today
The place you recomended i couldnt find but googling the description on thier catalog i found another place. $65 delivered but i still need a handle.
I want a stainless,aluminium or chromed brass handle and ive found one for $50 that has a proper house style key and the barrel can be removed from the front by a locksmith if i have any issues later.
Some cant and if the hatch is stuck locked im screwed.
I weighed the hatch assembly on the bathroom scales and it came in at 15kg.
Not to bad considering how much the stack of hardwood i built it out of weighed
Now i need to work out my struts.
Oh.... i bit the builet and got a hurricane hinge from queensland