Banzai Music, Berlin can match 16 valves. Postage to Australia is €16. The unit price includes vat@16%, that comes off at checkout when you enter your destination.
A bit over €300 for EH 6CA7, which is my recommendation, but they carry most EL34/KT77 reissue. Look for the platinum matched option when you're scrolling through.
Check them out, I've had nothing but good results dealing with Banzai. They don't charge gst at the checkout and I've never been clipped by Australian Customs.