Was is buzzard, or bustard? Bustard was rather common in traditional salmon dressed flies, as well as wets. Now it is pretty expensive and harder to get.

You can get ostrich and emu herls in tons of colors. They are both similar to peacock, but with longer softer "fuzz". I've never worked with bustard, but someone else may have a sutible substitute suggestion for you. Or you can google it and see what you come up with.

Good luck, and post a picture of what you tie.