I still have the OEM wiper blades on my 2007 Coupe. And I get the wiper blade refills from PIAA; DriverSide = 20"; PassengerSide = 22". Fit the factory wiper blades perfectly. I've also used a PIAA 21" wiper blade refill for both sides.

Attached are invoices from several sources I've used.

Hope this helps,