Hi buddy, the Chimay one is 750ml and the Augustiner fit most 500 ml bottles, I have some Liefmann ones for smaller bottles, as to postage, well if you wanted to get a quote from a courier but I don't know if it would make it worthwhile for you?
I've only done the brewferm kit which I added orange curaçao peel and coriander to, nothing like a wheat beer though but it tastes ok, try asking on the craft brewing forum mate!
I use a little bottler so as the beer level reaches the rim, you remove it and the displaced volume reduces the beer level to about an inch and a half from the top.