Trouble buying an Item from Australia

[paulsmith1974]

Hi Ebay.

I am trying to purchase an item from Australia, I live in the UK. I put the item in by basket and try to check out however i get the following message - This seller didn't include postage costs to your location. Please contact the seller or change your address. I can not proceed any further

I have contacted the Supplier and they have told me i need to order the item first and they will chare postage of $27.50 afterwards. However i am unable to check out due to the above message.

Can you help!