Yes, that's one of the pieces shown in two photographs, side by side, from different angles. Probably part of a trailing edge from a wing or stabiliser?
The other is in the first link and looks more like part of a fairing, similar to the piece found by Liam Lotter a while ago.
The one you've posted an image of (thank you) was found about two weeks ago in the North of the island; the other was found at the Southern tip, yesterday (Tuesday).