eBay Expert - Block Domestic Shipping Zones

We want to block buyers from certain domestic postal regions from purchasing some products from our eBay store ([login to view URL]). The following link shows an example of a seller "excluding" certain postal regions from shipping. ([login to view URL]) The names of the regions, Northern Territory, QLD Far North, WA Regional, WA Remote, comes from the eBay Postage Rates Table. We want: - the excluded zones to be displayed in the same way as on the Postage and Payments page. - the red warning stating that postage can't be calculated, do to location. (to test on the example page enter 7100 in postcode) - a "hard block" on buyers whose shipping postcode is in an excluded zone. (negotiable). - the flexibility to choose different exclusion regions for different products.