In reply to Rich Jenkin:
There are also a handful on the sector called Top Deck at Goat Crag.
Whether it would be worth the journey just to introduce the things involved in a belay stance is maybe questionable though.
It might be simpler to find a route closer to home that has a decent ledge on it and splitting that into two pitches? I don't know whether you have trad gear, but you could certainly mock up a sport changeover easily enough that way too.