Same here, only less mileage.
I've gone thru the original bridgescraps, and am on my second set of Avons at nearly 14,000 miles. So I'm getting about 5-6000 per set. As FJ mentioned, front isn't as worn as the rear, but there isn't enough left to justify the hassle and down time, so I replace both each time.
I've got a spare set sitting in my closet downstairs. The last time I had the dealer order them for me and it was well over $400 for the tires and installation. I can have them shipped to my door for $215 from Motorcycle Accessory Warehouse.......