On this page, http://www.greenplastic.com/coldstorage/gear/jonny.php (duplicated across the internet), it’s listed that Jonny Greenwood uses a “FARTAR keyboard controller running e-mu classic keys.” This should probably read: “FATAR keyboard controller using E-mu Systems Classic Keys module.”
FATAR’s midi controllors are available online via Studiologic.net. The E-mu Systems Classic Keys is described here.