You need as close to zero offset as possible rims. You may want to look at the Konig Rewind rim. Available in a range of sexy colours they are just like the original minilite, just cheaper and more availble. But don't take my word for it haha GTRHOLIC knows more about getting the phat look.
Genuine Minilites are rare and expensive, hard to find in 15" as well.
Watanabe RS8 and Black Racing 8 spokes are the closest in rims from Japan. These are also expensive considering the condition they're usually in (the import cost from japan is what gets you).
To get that inwards tyre look you need to fit tyres which arent wide enough for the rims. I can guarantee you aren't going to find ANY tyre on the australian market which will let you do this. 195/45R15 is the standard and most available size for micras with 15" rims. The next which is appearing more often now is 185/45R15 - i havent seen these fitted to a micra yet. You might try finding a guy on these forums named robbo (i think) though...
Goodluck. Its a pretty cool look for the K11. Better than those god awful bodykits some people seem to be interested in.