I like these seat also; they are pricey though; best deal online ~$1,300/pc. My stock leather manual sport seats are ok, wish they were hi-back, but can't be used with harnesses for AutoX/DE.
I looked around and found a race shop that had some Sportster CS seats in stock. The shop was local so I drove over to take a closer look. The seats were llight weight and fairly comfortable but the harness cutouts were too low for me; I'm 6'5" tall. The shop wanted pretty close to >$3k for 2 seats with installation so I decided to pass.
Miraculously, a couple of months later a local guy was selling a pair of no-name reclinable sport seats with harness cutouts for cheap. Thanks Jerry! These look very similar to the sparco milano seats!? It look a little work to get them mounted with my stock sliders but they are finally in.
Now I have some funds remaining to spend on a/c stuff and exhaust.