Thanks California! I looked on several German and Netherlands tire sites for the tires. They were surprisingly hard to find, out of stock in several places. The two places I did find were
Ebay UK and
this recommended German site. The prices from Ebay UK were 47.04 Euros a tire, not bad. But this does not include shipping. It said this about U.S. postage - "May not post to United States - Read item description or contact seller for postage options."
The German site had them listed as out of stock, but I checked shipping anyhow. It was 81 Euros +
85 Euros shipping to South Africa!
I would imagine the same shipping prices would be to America. Bummer. That's over $600 for the tires when I can get the RE92's for ~$350, shipped and mounted.