You don't have to weave to make a hair hackle wetfly.
Pott Stickers jamb the hair up against a bead to in order achieve much the same thing. Willy and Chris at the Troutfitters shop in Bozeman MT make synthetic hackle wet flies too, also with the same bead-jamb technique.
Now that you've brought this up.....it makes me wonder if I couldn't use a lump of foam instead of a bead, in
order to make a hair hackle dry fly.
Might have to call that one the Pott Licker.....OK, here's a first stab at a Pott Licker: