I run GR8 rings. They cost about $65 USD each and then shipping is another $30 from Australia to the US. It's best to order more than one ring to minimize shipping. Most of the rings I have are fine, though some are a bit tight around the SRM spider.
I believe Rotor NoQ rings come large, but I had issues with those not fitting the SRM.
And if you want Kronos, PM me. I believe they cost about $100 each.