I usually get most of my fly-tying stuff from cabelas.com (in the US) the service on their site is excellent, but I get everything else such as premium marabou feathers from luremaking.com (Ontario based). What you'll probably want is the extra long strung marabou, i think theyre currently out of black tho. There's also local tackle shops that sell it, BPS has a fly shop that sells materials I think.