£350.
A Legacy STI quick shift which can be used to upgrade a Forester Diesel 6 speed manual.
http://www.subaruforester.org/vbulletin/f89/6mt-owners-get-here-short-shifter-276105/
Fitment instructions: http://legacygt.com/forums/attachment.php?attachmentid=162443&d=1378659212
http://legacygt.com/forums/showpost.php?p=4574448&postcount=9
Listed on ebay here:
https://www.ebay.co.uk/itm/322870277798