There's these bags http://www.klickfix.de/index.php?lang=en

The site says the Contour, waterproof is scheduled for release soon.

QR clip is a band on the seatpost, so fits any saddle..

Carradice SQR another rear bag long but narrow behind the saddle

http://www.wiggle.co.uk/us/carradice...g-sqr-bracket/

so leg contact not a problem