Two alternatives to try before splashing the cash.
A fly style that is very popular for grayling. The bead originally was mounted onto a seamstresses pin which is bent about 30 degrees 1 bead width behind the head then tied in to the hook shank under the dressing. (Didn't have any pins to hand so used melted mono just to be able to show the style.
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Soft hackle fibres for a tail 2 different body colours usually darker at the thorax, and a partridge hackle wound around the base of the bead.
The other idea uses any bead head fly you like. Tie it on with a turle knot with the line through the eye the "wrong way" (From below) and seat the knot behind the bead. (I've used wire here to make it easier to photograph). Then the fly will fish in the same attitude as a jig hook. Make sure there are no sharp edges left on the bead.
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(These are both here is you want them you can collect when you come round)
Should, at least, give you an idea if it is a style you want to pursue, even if it doesn't replace the need for special hooks.
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